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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclencoding.c,v 1.1.1.1 2001/06/13 04:37:49 dtashley Exp $ */
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/*
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* tclEncoding.c --
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*
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* Contains the implementation of the encoding conversion package.
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*
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* Copyright (c) 1996-1998 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tclencoding.c,v 1.1.1.1 2001/06/13 04:37:49 dtashley Exp $
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*/
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#include "tclInt.h"
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#include "tclPort.h"
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typedef size_t (LengthProc)_ANSI_ARGS_((CONST char *src));
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/*
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* The following data structure represents an encoding, which describes how
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* to convert between various character sets and UTF-8.
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*/
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typedef struct Encoding {
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char *name; /* Name of encoding. Malloced because (1)
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* hash table entry that owns this encoding
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* may be freed prior to this encoding being
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* freed, (2) string passed in the
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* Tcl_EncodingType structure may not be
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* persistent. */
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Tcl_EncodingConvertProc *toUtfProc;
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/* Procedure to convert from external
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* encoding into UTF-8. */
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Tcl_EncodingConvertProc *fromUtfProc;
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/* Procedure to convert from UTF-8 into
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* external encoding. */
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Tcl_EncodingFreeProc *freeProc;
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/* If non-NULL, procedure to call when this
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* encoding is deleted. */
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int nullSize; /* Number of 0x00 bytes that signify
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* end-of-string in this encoding. This
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* number is used to determine the source
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* string length when the srcLen argument is
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* negative. This number can be 1 or 2. */
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ClientData clientData; /* Arbitrary value associated with encoding
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* type. Passed to conversion procedures. */
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LengthProc *lengthProc; /* Function to compute length of
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* null-terminated strings in this encoding.
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* If nullSize is 1, this is strlen; if
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* nullSize is 2, this is a function that
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* returns the number of bytes in a 0x0000
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* terminated string. */
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int refCount; /* Number of uses of this structure. */
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Tcl_HashEntry *hPtr; /* Hash table entry that owns this encoding. */
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} Encoding;
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/*
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* The following structure is the clientData for a dynamically-loaded,
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* table-driven encoding created by LoadTableEncoding(). It maps between
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* Unicode and a single-byte, double-byte, or multibyte (1 or 2 bytes only)
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* encoding.
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*/
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typedef struct TableEncodingData {
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int fallback; /* Character (in this encoding) to
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* substitute when this encoding cannot
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* represent a UTF-8 character. */
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char prefixBytes[256]; /* If a byte in the input stream is a lead
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* byte for a 2-byte sequence, the
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* corresponding entry in this array is 1,
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* otherwise it is 0. */
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unsigned short **toUnicode; /* Two dimensional sparse matrix to map
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* characters from the encoding to Unicode.
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* Each element of the toUnicode array points
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* to an array of 256 shorts. If there is no
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* corresponding character in Unicode, the
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* value in the matrix is 0x0000. malloc'd. */
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unsigned short **fromUnicode;
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/* Two dimensional sparse matrix to map
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* characters from Unicode to the encoding.
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* Each element of the fromUnicode array
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* points to an array of 256 shorts. If there
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* is no corresponding character the encoding,
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* the value in the matrix is 0x0000.
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* malloc'd. */
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} TableEncodingData;
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/*
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* The following structures is the clientData for a dynamically-loaded,
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* escape-driven encoding that is itself comprised of other simpler
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* encodings. An example is "iso-2022-jp", which uses escape sequences to
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* switch between ascii, jis0208, jis0212, gb2312, and ksc5601. Note that
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* "escape-driven" does not necessarily mean that the ESCAPE character is
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* the character used for switching character sets.
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*/
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typedef struct EscapeSubTable {
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unsigned int sequenceLen; /* Length of following string. */
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char sequence[16]; /* Escape code that marks this encoding. */
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char name[32]; /* Name for encoding. */
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Encoding *encodingPtr; /* Encoding loaded using above name, or NULL
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* if this sub-encoding has not been needed
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* yet. */
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} EscapeSubTable;
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typedef struct EscapeEncodingData {
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int fallback; /* Character (in this encoding) to
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* substitute when this encoding cannot
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* represent a UTF-8 character. */
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unsigned int initLen; /* Length of following string. */
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char init[16]; /* String to emit or expect before first char
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* in conversion. */
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unsigned int finalLen; /* Length of following string. */
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char final[16]; /* String to emit or expect after last char
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* in conversion. */
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char prefixBytes[256]; /* If a byte in the input stream is the
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* first character of one of the escape
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* sequences in the following array, the
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* corresponding entry in this array is 1,
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* otherwise it is 0. */
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int numSubTables; /* Length of following array. */
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EscapeSubTable subTables[1];/* Information about each EscapeSubTable
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* used by this encoding type. The actual
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* size will be as large as necessary to
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* hold all EscapeSubTables. */
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} EscapeEncodingData;
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/*
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* Constants used when loading an encoding file to identify the type of the
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* file.
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*/
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#define ENCODING_SINGLEBYTE 0
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#define ENCODING_DOUBLEBYTE 1
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#define ENCODING_MULTIBYTE 2
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#define ENCODING_ESCAPE 3
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/*
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* Initialize the default encoding directory. If this variable contains
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* a non NULL value, it will be the first path used to locate the
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* system encoding files.
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*/
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char *tclDefaultEncodingDir = NULL;
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static int encodingsInitialized = 0;
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/*
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* Hash table that keeps track of all loaded Encodings. Keys are
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* the string names that represent the encoding, values are (Encoding *).
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*/
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static Tcl_HashTable encodingTable;
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TCL_DECLARE_MUTEX(encodingMutex)
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/*
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* The following are used to hold the default and current system encodings.
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* If NULL is passed to one of the conversion routines, the current setting
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* of the system encoding will be used to perform the conversion.
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*/
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static Tcl_Encoding defaultEncoding;
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static Tcl_Encoding systemEncoding;
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/*
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* The following variable is used in the sparse matrix code for a
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* TableEncoding to represent a page in the table that has no entries.
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*/
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static unsigned short emptyPage[256];
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/*
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* Procedures used only in this module.
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*/
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static int BinaryProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static void EscapeFreeProc _ANSI_ARGS_((ClientData clientData));
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static int EscapeFromUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static int EscapeToUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static void FreeEncoding _ANSI_ARGS_((Tcl_Encoding encoding));
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static Encoding * GetTableEncoding _ANSI_ARGS_((
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EscapeEncodingData *dataPtr, int state));
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static Tcl_Encoding LoadEncodingFile _ANSI_ARGS_((Tcl_Interp *interp,
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CONST char *name));
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static Tcl_Encoding LoadTableEncoding _ANSI_ARGS_((Tcl_Interp *interp,
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CONST char *name, int type, Tcl_Channel chan));
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static Tcl_Encoding LoadEscapeEncoding _ANSI_ARGS_((CONST char *name,
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Tcl_Channel chan));
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static Tcl_Channel OpenEncodingFile _ANSI_ARGS_((CONST char *dir,
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CONST char *name));
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static void TableFreeProc _ANSI_ARGS_((ClientData clientData));
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static int TableFromUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static int TableToUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static size_t unilen _ANSI_ARGS_((CONST char *src));
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static int UnicodeToUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static int UtfToUnicodeProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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static int UtfToUtfProc _ANSI_ARGS_((ClientData clientData,
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CONST char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr));
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/*
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*---------------------------------------------------------------------------
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*
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* TclInitEncodingSubsystem --
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*
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* Initialize all resources used by this subsystem on a per-process
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* basis.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Depends on the memory, object, and IO subsystems.
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*
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*---------------------------------------------------------------------------
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*/
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void
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TclInitEncodingSubsystem()
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{
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Tcl_EncodingType type;
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Tcl_MutexLock(&encodingMutex);
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Tcl_InitHashTable(&encodingTable, TCL_STRING_KEYS);
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Tcl_MutexUnlock(&encodingMutex);
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/*
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* Create a few initial encodings. Note that the UTF-8 to UTF-8
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* translation is not a no-op, because it will turn a stream of
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* improperly formed UTF-8 into a properly formed stream.
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*/
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type.encodingName = "identity";
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type.toUtfProc = BinaryProc;
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type.fromUtfProc = BinaryProc;
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type.freeProc = NULL;
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type.nullSize = 1;
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type.clientData = NULL;
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defaultEncoding = Tcl_CreateEncoding(&type);
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systemEncoding = Tcl_GetEncoding(NULL, type.encodingName);
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type.encodingName = "utf-8";
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type.toUtfProc = UtfToUtfProc;
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type.fromUtfProc = UtfToUtfProc;
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type.freeProc = NULL;
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type.nullSize = 1;
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type.clientData = NULL;
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Tcl_CreateEncoding(&type);
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type.encodingName = "unicode";
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type.toUtfProc = UnicodeToUtfProc;
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type.fromUtfProc = UtfToUnicodeProc;
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type.freeProc = NULL;
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type.nullSize = 2;
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type.clientData = NULL;
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Tcl_CreateEncoding(&type);
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}
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293 |
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/*
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*----------------------------------------------------------------------
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*
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* TclFinalizeEncodingSubsystem --
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*
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* Release the state associated with the encoding subsystem.
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*
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* Results:
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302 |
* None.
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303 |
*
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* Side effects:
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* Frees all of the encodings.
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*
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*----------------------------------------------------------------------
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308 |
*/
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309 |
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void
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TclFinalizeEncodingSubsystem()
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{
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313 |
Tcl_HashSearch search;
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Tcl_HashEntry *hPtr;
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Encoding *encodingPtr;
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316 |
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Tcl_MutexLock(&encodingMutex);
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encodingsInitialized = 0;
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hPtr = Tcl_FirstHashEntry(&encodingTable, &search);
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while (hPtr != NULL) {
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encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr);
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if (encodingPtr->freeProc != NULL) {
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(*encodingPtr->freeProc)(encodingPtr->clientData);
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324 |
}
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325 |
ckfree((char *) encodingPtr->name);
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326 |
ckfree((char *) encodingPtr);
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327 |
hPtr = Tcl_NextHashEntry(&search);
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328 |
}
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329 |
Tcl_DeleteHashTable(&encodingTable);
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330 |
Tcl_MutexUnlock(&encodingMutex);
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331 |
}
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332 |
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333 |
/*
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334 |
*-------------------------------------------------------------------------
|
335 |
*
|
336 |
* Tcl_GetDefaultEncodingDir --
|
337 |
*
|
338 |
*
|
339 |
* Results:
|
340 |
*
|
341 |
* Side effects:
|
342 |
*
|
343 |
*-------------------------------------------------------------------------
|
344 |
*/
|
345 |
|
346 |
char *
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347 |
Tcl_GetDefaultEncodingDir()
|
348 |
{
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349 |
return tclDefaultEncodingDir;
|
350 |
}
|
351 |
|
352 |
/*
|
353 |
*-------------------------------------------------------------------------
|
354 |
*
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355 |
* Tcl_SetDefaultEncodingDir --
|
356 |
*
|
357 |
*
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358 |
* Results:
|
359 |
*
|
360 |
* Side effects:
|
361 |
*
|
362 |
*-------------------------------------------------------------------------
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363 |
*/
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364 |
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365 |
void
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366 |
Tcl_SetDefaultEncodingDir(path)
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367 |
char *path;
|
368 |
{
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369 |
tclDefaultEncodingDir = (char *)ckalloc((unsigned) strlen(path) + 1);
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370 |
strcpy(tclDefaultEncodingDir, path);
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371 |
}
|
372 |
|
373 |
/*
|
374 |
*-------------------------------------------------------------------------
|
375 |
*
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376 |
* Tcl_GetEncoding --
|
377 |
*
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378 |
* Given the name of a encoding, find the corresponding Tcl_Encoding
|
379 |
* token. If the encoding did not already exist, Tcl attempts to
|
380 |
* dynamically load an encoding by that name.
|
381 |
*
|
382 |
* Results:
|
383 |
* Returns a token that represents the encoding. If the name didn't
|
384 |
* refer to any known or loadable encoding, NULL is returned. If
|
385 |
* NULL was returned, an error message is left in interp's result
|
386 |
* object, unless interp was NULL.
|
387 |
*
|
388 |
* Side effects:
|
389 |
* The new encoding type is entered into a table visible to all
|
390 |
* interpreters, keyed off the encoding's name. For each call to
|
391 |
* this procedure, there should eventually be a call to
|
392 |
* Tcl_FreeEncoding, so that the database can be cleaned up when
|
393 |
* encodings aren't needed anymore.
|
394 |
*
|
395 |
*-------------------------------------------------------------------------
|
396 |
*/
|
397 |
|
398 |
Tcl_Encoding
|
399 |
Tcl_GetEncoding(interp, name)
|
400 |
Tcl_Interp *interp; /* Interp for error reporting, if not NULL. */
|
401 |
CONST char *name; /* The name of the desired encoding. */
|
402 |
{
|
403 |
Tcl_HashEntry *hPtr;
|
404 |
Encoding *encodingPtr;
|
405 |
|
406 |
Tcl_MutexLock(&encodingMutex);
|
407 |
if (name == NULL) {
|
408 |
encodingPtr = (Encoding *) systemEncoding;
|
409 |
encodingPtr->refCount++;
|
410 |
Tcl_MutexUnlock(&encodingMutex);
|
411 |
return systemEncoding;
|
412 |
}
|
413 |
|
414 |
hPtr = Tcl_FindHashEntry(&encodingTable, name);
|
415 |
if (hPtr != NULL) {
|
416 |
encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr);
|
417 |
encodingPtr->refCount++;
|
418 |
Tcl_MutexUnlock(&encodingMutex);
|
419 |
return (Tcl_Encoding) encodingPtr;
|
420 |
}
|
421 |
Tcl_MutexUnlock(&encodingMutex);
|
422 |
return LoadEncodingFile(interp, name);
|
423 |
}
|
424 |
|
425 |
/*
|
426 |
*---------------------------------------------------------------------------
|
427 |
*
|
428 |
* Tcl_FreeEncoding --
|
429 |
*
|
430 |
* This procedure is called to release an encoding allocated by
|
431 |
* Tcl_CreateEncoding() or Tcl_GetEncoding().
|
432 |
*
|
433 |
* Results:
|
434 |
* None.
|
435 |
*
|
436 |
* Side effects:
|
437 |
* The reference count associated with the encoding is decremented
|
438 |
* and the encoding may be deleted if nothing is using it anymore.
|
439 |
*
|
440 |
*---------------------------------------------------------------------------
|
441 |
*/
|
442 |
|
443 |
void
|
444 |
Tcl_FreeEncoding(encoding)
|
445 |
Tcl_Encoding encoding;
|
446 |
{
|
447 |
Tcl_MutexLock(&encodingMutex);
|
448 |
FreeEncoding(encoding);
|
449 |
Tcl_MutexUnlock(&encodingMutex);
|
450 |
}
|
451 |
|
452 |
/*
|
453 |
*----------------------------------------------------------------------
|
454 |
*
|
455 |
* FreeEncoding --
|
456 |
*
|
457 |
* This procedure is called to release an encoding by procedures
|
458 |
* that already have the encodingMutex.
|
459 |
*
|
460 |
* Results:
|
461 |
* None.
|
462 |
*
|
463 |
* Side effects:
|
464 |
* The reference count associated with the encoding is decremented
|
465 |
* and the encoding may be deleted if nothing is using it anymore.
|
466 |
*
|
467 |
*----------------------------------------------------------------------
|
468 |
*/
|
469 |
|
470 |
static void
|
471 |
FreeEncoding(encoding)
|
472 |
Tcl_Encoding encoding;
|
473 |
{
|
474 |
Encoding *encodingPtr;
|
475 |
|
476 |
encodingPtr = (Encoding *) encoding;
|
477 |
if (encodingPtr == NULL) {
|
478 |
return;
|
479 |
}
|
480 |
encodingPtr->refCount--;
|
481 |
if (encodingPtr->refCount == 0) {
|
482 |
if (encodingPtr->freeProc != NULL) {
|
483 |
(*encodingPtr->freeProc)(encodingPtr->clientData);
|
484 |
}
|
485 |
if (encodingPtr->hPtr != NULL) {
|
486 |
Tcl_DeleteHashEntry(encodingPtr->hPtr);
|
487 |
}
|
488 |
ckfree((char *) encodingPtr->name);
|
489 |
ckfree((char *) encodingPtr);
|
490 |
}
|
491 |
}
|
492 |
|
493 |
/*
|
494 |
*-------------------------------------------------------------------------
|
495 |
*
|
496 |
* Tcl_GetEncodingName --
|
497 |
*
|
498 |
* Given an encoding, return the name that was used to constuct
|
499 |
* the encoding.
|
500 |
*
|
501 |
* Results:
|
502 |
* The name of the encoding.
|
503 |
*
|
504 |
* Side effects:
|
505 |
* None.
|
506 |
*
|
507 |
*---------------------------------------------------------------------------
|
508 |
*/
|
509 |
|
510 |
char *
|
511 |
Tcl_GetEncodingName(encoding)
|
512 |
Tcl_Encoding encoding; /* The encoding whose name to fetch. */
|
513 |
{
|
514 |
Encoding *encodingPtr;
|
515 |
|
516 |
if (encoding == NULL) {
|
517 |
encoding = systemEncoding;
|
518 |
}
|
519 |
encodingPtr = (Encoding *) encoding;
|
520 |
return encodingPtr->name;
|
521 |
}
|
522 |
|
523 |
/*
|
524 |
*-------------------------------------------------------------------------
|
525 |
*
|
526 |
* Tcl_GetEncodingNames --
|
527 |
*
|
528 |
* Get the list of all known encodings, including the ones stored
|
529 |
* as files on disk in the encoding path.
|
530 |
*
|
531 |
* Results:
|
532 |
* Modifies interp's result object to hold a list of all the available
|
533 |
* encodings.
|
534 |
*
|
535 |
* Side effects:
|
536 |
* None.
|
537 |
*
|
538 |
*-------------------------------------------------------------------------
|
539 |
*/
|
540 |
|
541 |
void
|
542 |
Tcl_GetEncodingNames(interp)
|
543 |
Tcl_Interp *interp; /* Interp to hold result. */
|
544 |
{
|
545 |
Tcl_HashSearch search;
|
546 |
Tcl_HashEntry *hPtr;
|
547 |
Tcl_Obj *pathPtr, *resultPtr;
|
548 |
int dummy;
|
549 |
|
550 |
Tcl_HashTable table;
|
551 |
|
552 |
Tcl_MutexLock(&encodingMutex);
|
553 |
Tcl_InitHashTable(&table, TCL_STRING_KEYS);
|
554 |
hPtr = Tcl_FirstHashEntry(&encodingTable, &search);
|
555 |
while (hPtr != NULL) {
|
556 |
Encoding *encodingPtr;
|
557 |
|
558 |
encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr);
|
559 |
Tcl_CreateHashEntry(&table, encodingPtr->name, &dummy);
|
560 |
hPtr = Tcl_NextHashEntry(&search);
|
561 |
}
|
562 |
Tcl_MutexUnlock(&encodingMutex);
|
563 |
|
564 |
pathPtr = TclGetLibraryPath();
|
565 |
if (pathPtr != NULL) {
|
566 |
int i, objc;
|
567 |
Tcl_Obj **objv;
|
568 |
Tcl_DString pwdString;
|
569 |
char globArgString[10];
|
570 |
|
571 |
objc = 0;
|
572 |
Tcl_ListObjGetElements(NULL, pathPtr, &objc, &objv);
|
573 |
|
574 |
Tcl_GetCwd(interp, &pwdString);
|
575 |
|
576 |
for (i = 0; i < objc; i++) {
|
577 |
char *string;
|
578 |
int j, objc2, length;
|
579 |
Tcl_Obj **objv2;
|
580 |
|
581 |
string = Tcl_GetStringFromObj(objv[i], NULL);
|
582 |
Tcl_ResetResult(interp);
|
583 |
|
584 |
/*
|
585 |
* TclGlob() changes the contents of globArgString, which causes
|
586 |
* a segfault if we pass in a pointer to non-writeable memory.
|
587 |
* TclGlob() puts its results directly into interp.
|
588 |
*/
|
589 |
|
590 |
strcpy(globArgString, "*.enc");
|
591 |
if ((Tcl_Chdir(string) == 0)
|
592 |
&& (Tcl_Chdir("encoding") == 0)
|
593 |
&& (TclGlob(interp, globArgString, NULL, 0, NULL) == TCL_OK)) {
|
594 |
objc2 = 0;
|
595 |
|
596 |
Tcl_ListObjGetElements(NULL, Tcl_GetObjResult(interp), &objc2,
|
597 |
&objv2);
|
598 |
|
599 |
for (j = 0; j < objc2; j++) {
|
600 |
string = Tcl_GetStringFromObj(objv2[j], &length);
|
601 |
length -= 4;
|
602 |
if (length > 0) {
|
603 |
string[length] = '\0';
|
604 |
Tcl_CreateHashEntry(&table, string, &dummy);
|
605 |
string[length] = '.';
|
606 |
}
|
607 |
}
|
608 |
}
|
609 |
Tcl_Chdir(Tcl_DStringValue(&pwdString));
|
610 |
}
|
611 |
Tcl_DStringFree(&pwdString);
|
612 |
}
|
613 |
|
614 |
/*
|
615 |
* Clear any values placed in the result by globbing.
|
616 |
*/
|
617 |
|
618 |
Tcl_ResetResult(interp);
|
619 |
resultPtr = Tcl_GetObjResult(interp);
|
620 |
|
621 |
hPtr = Tcl_FirstHashEntry(&table, &search);
|
622 |
while (hPtr != NULL) {
|
623 |
Tcl_Obj *strPtr;
|
624 |
|
625 |
strPtr = Tcl_NewStringObj(Tcl_GetHashKey(&table, hPtr), -1);
|
626 |
Tcl_ListObjAppendElement(NULL, resultPtr, strPtr);
|
627 |
hPtr = Tcl_NextHashEntry(&search);
|
628 |
}
|
629 |
Tcl_DeleteHashTable(&table);
|
630 |
}
|
631 |
|
632 |
/*
|
633 |
*------------------------------------------------------------------------
|
634 |
*
|
635 |
* Tcl_SetSystemEncoding --
|
636 |
*
|
637 |
* Sets the default encoding that should be used whenever the user
|
638 |
* passes a NULL value in to one of the conversion routines.
|
639 |
* If the supplied name is NULL, the system encoding is reset to the
|
640 |
* default system encoding.
|
641 |
*
|
642 |
* Results:
|
643 |
* The return value is TCL_OK if the system encoding was successfully
|
644 |
* set to the encoding specified by name, TCL_ERROR otherwise. If
|
645 |
* TCL_ERROR is returned, an error message is left in interp's result
|
646 |
* object, unless interp was NULL.
|
647 |
*
|
648 |
* Side effects:
|
649 |
* The reference count of the new system encoding is incremented.
|
650 |
* The reference count of the old system encoding is decremented and
|
651 |
* it may be freed.
|
652 |
*
|
653 |
*------------------------------------------------------------------------
|
654 |
*/
|
655 |
|
656 |
int
|
657 |
Tcl_SetSystemEncoding(interp, name)
|
658 |
Tcl_Interp *interp; /* Interp for error reporting, if not NULL. */
|
659 |
CONST char *name; /* The name of the desired encoding, or NULL
|
660 |
* to reset to default encoding. */
|
661 |
{
|
662 |
Tcl_Encoding encoding;
|
663 |
Encoding *encodingPtr;
|
664 |
|
665 |
if (name == NULL) {
|
666 |
Tcl_MutexLock(&encodingMutex);
|
667 |
encoding = defaultEncoding;
|
668 |
encodingPtr = (Encoding *) encoding;
|
669 |
encodingPtr->refCount++;
|
670 |
Tcl_MutexUnlock(&encodingMutex);
|
671 |
} else {
|
672 |
encoding = Tcl_GetEncoding(interp, name);
|
673 |
if (encoding == NULL) {
|
674 |
return TCL_ERROR;
|
675 |
}
|
676 |
}
|
677 |
|
678 |
Tcl_MutexLock(&encodingMutex);
|
679 |
FreeEncoding(systemEncoding);
|
680 |
systemEncoding = encoding;
|
681 |
Tcl_MutexUnlock(&encodingMutex);
|
682 |
|
683 |
return TCL_OK;
|
684 |
}
|
685 |
|
686 |
/*
|
687 |
*---------------------------------------------------------------------------
|
688 |
*
|
689 |
* Tcl_CreateEncoding --
|
690 |
*
|
691 |
* This procedure is called to define a new encoding and the procedures
|
692 |
* that are used to convert between the specified encoding and Unicode.
|
693 |
*
|
694 |
* Results:
|
695 |
* Returns a token that represents the encoding. If an encoding with
|
696 |
* the same name already existed, the old encoding token remains
|
697 |
* valid and continues to behave as it used to, and will eventually
|
698 |
* be garbage collected when the last reference to it goes away. Any
|
699 |
* subsequent calls to Tcl_GetEncoding with the specified name will
|
700 |
* retrieve the most recent encoding token.
|
701 |
*
|
702 |
* Side effects:
|
703 |
* The new encoding type is entered into a table visible to all
|
704 |
* interpreters, keyed off the encoding's name. For each call to
|
705 |
* this procedure, there should eventually be a call to
|
706 |
* Tcl_FreeEncoding, so that the database can be cleaned up when
|
707 |
* encodings aren't needed anymore.
|
708 |
*
|
709 |
*---------------------------------------------------------------------------
|
710 |
*/
|
711 |
|
712 |
Tcl_Encoding
|
713 |
Tcl_CreateEncoding(typePtr)
|
714 |
Tcl_EncodingType *typePtr; /* The encoding type. */
|
715 |
{
|
716 |
Tcl_HashEntry *hPtr;
|
717 |
int new;
|
718 |
Encoding *encodingPtr;
|
719 |
char *name;
|
720 |
|
721 |
Tcl_MutexLock(&encodingMutex);
|
722 |
hPtr = Tcl_CreateHashEntry(&encodingTable, typePtr->encodingName, &new);
|
723 |
if (new == 0) {
|
724 |
/*
|
725 |
* Remove old encoding from hash table, but don't delete it until
|
726 |
* last reference goes away.
|
727 |
*/
|
728 |
|
729 |
encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr);
|
730 |
encodingPtr->hPtr = NULL;
|
731 |
}
|
732 |
|
733 |
name = ckalloc((unsigned) strlen(typePtr->encodingName) + 1);
|
734 |
|
735 |
encodingPtr = (Encoding *) ckalloc(sizeof(Encoding));
|
736 |
encodingPtr->name = strcpy(name, typePtr->encodingName);
|
737 |
encodingPtr->toUtfProc = typePtr->toUtfProc;
|
738 |
encodingPtr->fromUtfProc = typePtr->fromUtfProc;
|
739 |
encodingPtr->freeProc = typePtr->freeProc;
|
740 |
encodingPtr->nullSize = typePtr->nullSize;
|
741 |
encodingPtr->clientData = typePtr->clientData;
|
742 |
if (typePtr->nullSize == 1) {
|
743 |
encodingPtr->lengthProc = (LengthProc *) strlen;
|
744 |
} else {
|
745 |
encodingPtr->lengthProc = (LengthProc *) unilen;
|
746 |
}
|
747 |
encodingPtr->refCount = 1;
|
748 |
encodingPtr->hPtr = hPtr;
|
749 |
Tcl_SetHashValue(hPtr, encodingPtr);
|
750 |
|
751 |
Tcl_MutexUnlock(&encodingMutex);
|
752 |
|
753 |
return (Tcl_Encoding) encodingPtr;
|
754 |
}
|
755 |
|
756 |
/*
|
757 |
*-------------------------------------------------------------------------
|
758 |
*
|
759 |
* Tcl_ExternalToUtfDString --
|
760 |
*
|
761 |
* Convert a source buffer from the specified encoding into UTF-8.
|
762 |
* If any of the bytes in the source buffer are invalid or cannot
|
763 |
* be represented in the target encoding, a default fallback
|
764 |
* character will be substituted.
|
765 |
*
|
766 |
* Results:
|
767 |
* The converted bytes are stored in the DString, which is then NULL
|
768 |
* terminated. The return value is a pointer to the value stored
|
769 |
* in the DString.
|
770 |
*
|
771 |
* Side effects:
|
772 |
* None.
|
773 |
*
|
774 |
*-------------------------------------------------------------------------
|
775 |
*/
|
776 |
|
777 |
char *
|
778 |
Tcl_ExternalToUtfDString(encoding, src, srcLen, dstPtr)
|
779 |
Tcl_Encoding encoding; /* The encoding for the source string, or
|
780 |
* NULL for the default system encoding. */
|
781 |
CONST char *src; /* Source string in specified encoding. */
|
782 |
int srcLen; /* Source string length in bytes, or < 0 for
|
783 |
* encoding-specific string length. */
|
784 |
Tcl_DString *dstPtr; /* Uninitialized or free DString in which
|
785 |
* the converted string is stored. */
|
786 |
{
|
787 |
char *dst;
|
788 |
Tcl_EncodingState state;
|
789 |
Encoding *encodingPtr;
|
790 |
int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars;
|
791 |
|
792 |
Tcl_DStringInit(dstPtr);
|
793 |
dst = Tcl_DStringValue(dstPtr);
|
794 |
dstLen = dstPtr->spaceAvl - 1;
|
795 |
|
796 |
if (encoding == NULL) {
|
797 |
encoding = systemEncoding;
|
798 |
}
|
799 |
encodingPtr = (Encoding *) encoding;
|
800 |
|
801 |
if (src == NULL) {
|
802 |
srcLen = 0;
|
803 |
} else if (srcLen < 0) {
|
804 |
srcLen = (*encodingPtr->lengthProc)(src);
|
805 |
}
|
806 |
flags = TCL_ENCODING_START | TCL_ENCODING_END;
|
807 |
while (1) {
|
808 |
result = (*encodingPtr->toUtfProc)(encodingPtr->clientData, src,
|
809 |
srcLen, flags, &state, dst, dstLen, &srcRead, &dstWrote,
|
810 |
&dstChars);
|
811 |
soFar = dst + dstWrote - Tcl_DStringValue(dstPtr);
|
812 |
if (result != TCL_CONVERT_NOSPACE) {
|
813 |
Tcl_DStringSetLength(dstPtr, soFar);
|
814 |
return Tcl_DStringValue(dstPtr);
|
815 |
}
|
816 |
flags &= ~TCL_ENCODING_START;
|
817 |
src += srcRead;
|
818 |
srcLen -= srcRead;
|
819 |
if (Tcl_DStringLength(dstPtr) == 0) {
|
820 |
Tcl_DStringSetLength(dstPtr, dstLen);
|
821 |
}
|
822 |
Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1);
|
823 |
dst = Tcl_DStringValue(dstPtr) + soFar;
|
824 |
dstLen = Tcl_DStringLength(dstPtr) - soFar - 1;
|
825 |
}
|
826 |
}
|
827 |
|
828 |
/*
|
829 |
*-------------------------------------------------------------------------
|
830 |
*
|
831 |
* Tcl_ExternalToUtf --
|
832 |
*
|
833 |
* Convert a source buffer from the specified encoding into UTF-8,
|
834 |
*
|
835 |
* Results:
|
836 |
* The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE,
|
837 |
* TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE,
|
838 |
* as documented in tcl.h.
|
839 |
*
|
840 |
* Side effects:
|
841 |
* The converted bytes are stored in the output buffer.
|
842 |
*
|
843 |
*-------------------------------------------------------------------------
|
844 |
*/
|
845 |
|
846 |
int
|
847 |
Tcl_ExternalToUtf(interp, encoding, src, srcLen, flags, statePtr, dst,
|
848 |
dstLen, srcReadPtr, dstWrotePtr, dstCharsPtr)
|
849 |
Tcl_Interp *interp; /* Interp for error return, if not NULL. */
|
850 |
Tcl_Encoding encoding; /* The encoding for the source string, or
|
851 |
* NULL for the default system encoding. */
|
852 |
CONST char *src; /* Source string in specified encoding. */
|
853 |
int srcLen; /* Source string length in bytes, or < 0 for
|
854 |
* encoding-specific string length. */
|
855 |
int flags; /* Conversion control flags. */
|
856 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
857 |
* state information used during a piecewise
|
858 |
* conversion. Contents of statePtr are
|
859 |
* initialized and/or reset by conversion
|
860 |
* routine under control of flags argument. */
|
861 |
char *dst; /* Output buffer in which converted string
|
862 |
* is stored. */
|
863 |
int dstLen; /* The maximum length of output buffer in
|
864 |
* bytes. */
|
865 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
866 |
* source string that were converted. This
|
867 |
* may be less than the original source length
|
868 |
* if there was a problem converting some
|
869 |
* source characters. */
|
870 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
871 |
* stored in the output buffer as a result of
|
872 |
* the conversion. */
|
873 |
int *dstCharsPtr; /* Filled with the number of characters that
|
874 |
* correspond to the bytes stored in the
|
875 |
* output buffer. */
|
876 |
{
|
877 |
Encoding *encodingPtr;
|
878 |
int result, srcRead, dstWrote, dstChars;
|
879 |
Tcl_EncodingState state;
|
880 |
|
881 |
if (encoding == NULL) {
|
882 |
encoding = systemEncoding;
|
883 |
}
|
884 |
encodingPtr = (Encoding *) encoding;
|
885 |
|
886 |
if (src == NULL) {
|
887 |
srcLen = 0;
|
888 |
} else if (srcLen < 0) {
|
889 |
srcLen = (*encodingPtr->lengthProc)(src);
|
890 |
}
|
891 |
if (statePtr == NULL) {
|
892 |
flags |= TCL_ENCODING_START | TCL_ENCODING_END;
|
893 |
statePtr = &state;
|
894 |
}
|
895 |
if (srcReadPtr == NULL) {
|
896 |
srcReadPtr = &srcRead;
|
897 |
}
|
898 |
if (dstWrotePtr == NULL) {
|
899 |
dstWrotePtr = &dstWrote;
|
900 |
}
|
901 |
if (dstCharsPtr == NULL) {
|
902 |
dstCharsPtr = &dstChars;
|
903 |
}
|
904 |
|
905 |
/*
|
906 |
* If there are any null characters in the middle of the buffer, they will
|
907 |
* converted to the UTF-8 null character (\xC080). To get the actual
|
908 |
* \0 at the end of the destination buffer, we need to append it manually.
|
909 |
*/
|
910 |
|
911 |
dstLen--;
|
912 |
result = (*encodingPtr->toUtfProc)(encodingPtr->clientData, src, srcLen,
|
913 |
flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr,
|
914 |
dstCharsPtr);
|
915 |
dst[*dstWrotePtr] = '\0';
|
916 |
return result;
|
917 |
}
|
918 |
|
919 |
/*
|
920 |
*-------------------------------------------------------------------------
|
921 |
*
|
922 |
* Tcl_UtfToExternalDString --
|
923 |
*
|
924 |
* Convert a source buffer from UTF-8 into the specified encoding.
|
925 |
* If any of the bytes in the source buffer are invalid or cannot
|
926 |
* be represented in the target encoding, a default fallback
|
927 |
* character will be substituted.
|
928 |
*
|
929 |
* Results:
|
930 |
* The converted bytes are stored in the DString, which is then
|
931 |
* NULL terminated in an encoding-specific manner. The return value
|
932 |
* is a pointer to the value stored in the DString.
|
933 |
*
|
934 |
* Side effects:
|
935 |
* None.
|
936 |
*
|
937 |
*-------------------------------------------------------------------------
|
938 |
*/
|
939 |
|
940 |
char *
|
941 |
Tcl_UtfToExternalDString(encoding, src, srcLen, dstPtr)
|
942 |
Tcl_Encoding encoding; /* The encoding for the converted string,
|
943 |
* or NULL for the default system encoding. */
|
944 |
CONST char *src; /* Source string in UTF-8. */
|
945 |
int srcLen; /* Source string length in bytes, or < 0 for
|
946 |
* strlen(). */
|
947 |
Tcl_DString *dstPtr; /* Uninitialized or free DString in which
|
948 |
* the converted string is stored. */
|
949 |
{
|
950 |
char *dst;
|
951 |
Tcl_EncodingState state;
|
952 |
Encoding *encodingPtr;
|
953 |
int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars;
|
954 |
|
955 |
Tcl_DStringInit(dstPtr);
|
956 |
dst = Tcl_DStringValue(dstPtr);
|
957 |
dstLen = dstPtr->spaceAvl - 1;
|
958 |
|
959 |
if (encoding == NULL) {
|
960 |
encoding = systemEncoding;
|
961 |
}
|
962 |
encodingPtr = (Encoding *) encoding;
|
963 |
|
964 |
if (src == NULL) {
|
965 |
srcLen = 0;
|
966 |
} else if (srcLen < 0) {
|
967 |
srcLen = strlen(src);
|
968 |
}
|
969 |
flags = TCL_ENCODING_START | TCL_ENCODING_END;
|
970 |
while (1) {
|
971 |
result = (*encodingPtr->fromUtfProc)(encodingPtr->clientData, src,
|
972 |
srcLen, flags, &state, dst, dstLen, &srcRead, &dstWrote,
|
973 |
&dstChars);
|
974 |
soFar = dst + dstWrote - Tcl_DStringValue(dstPtr);
|
975 |
if (result != TCL_CONVERT_NOSPACE) {
|
976 |
if (encodingPtr->nullSize == 2) {
|
977 |
Tcl_DStringSetLength(dstPtr, soFar + 1);
|
978 |
}
|
979 |
Tcl_DStringSetLength(dstPtr, soFar);
|
980 |
return Tcl_DStringValue(dstPtr);
|
981 |
}
|
982 |
flags &= ~TCL_ENCODING_START;
|
983 |
src += srcRead;
|
984 |
srcLen -= srcRead;
|
985 |
if (Tcl_DStringLength(dstPtr) == 0) {
|
986 |
Tcl_DStringSetLength(dstPtr, dstLen);
|
987 |
}
|
988 |
Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1);
|
989 |
dst = Tcl_DStringValue(dstPtr) + soFar;
|
990 |
dstLen = Tcl_DStringLength(dstPtr) - soFar - 1;
|
991 |
}
|
992 |
}
|
993 |
|
994 |
/*
|
995 |
*-------------------------------------------------------------------------
|
996 |
*
|
997 |
* Tcl_UtfToExternal --
|
998 |
*
|
999 |
* Convert a buffer from UTF-8 into the specified encoding.
|
1000 |
*
|
1001 |
* Results:
|
1002 |
* The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE,
|
1003 |
* TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE,
|
1004 |
* as documented in tcl.h.
|
1005 |
*
|
1006 |
* Side effects:
|
1007 |
* The converted bytes are stored in the output buffer.
|
1008 |
*
|
1009 |
*-------------------------------------------------------------------------
|
1010 |
*/
|
1011 |
|
1012 |
int
|
1013 |
Tcl_UtfToExternal(interp, encoding, src, srcLen, flags, statePtr, dst,
|
1014 |
dstLen, srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1015 |
Tcl_Interp *interp; /* Interp for error return, if not NULL. */
|
1016 |
Tcl_Encoding encoding; /* The encoding for the converted string,
|
1017 |
* or NULL for the default system encoding. */
|
1018 |
CONST char *src; /* Source string in UTF-8. */
|
1019 |
int srcLen; /* Source string length in bytes, or < 0 for
|
1020 |
* strlen(). */
|
1021 |
int flags; /* Conversion control flags. */
|
1022 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1023 |
* state information used during a piecewise
|
1024 |
* conversion. Contents of statePtr are
|
1025 |
* initialized and/or reset by conversion
|
1026 |
* routine under control of flags argument. */
|
1027 |
char *dst; /* Output buffer in which converted string
|
1028 |
* is stored. */
|
1029 |
int dstLen; /* The maximum length of output buffer in
|
1030 |
* bytes. */
|
1031 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1032 |
* source string that were converted. This
|
1033 |
* may be less than the original source length
|
1034 |
* if there was a problem converting some
|
1035 |
* source characters. */
|
1036 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1037 |
* stored in the output buffer as a result of
|
1038 |
* the conversion. */
|
1039 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1040 |
* correspond to the bytes stored in the
|
1041 |
* output buffer. */
|
1042 |
{
|
1043 |
Encoding *encodingPtr;
|
1044 |
int result, srcRead, dstWrote, dstChars;
|
1045 |
Tcl_EncodingState state;
|
1046 |
|
1047 |
if (encoding == NULL) {
|
1048 |
encoding = systemEncoding;
|
1049 |
}
|
1050 |
encodingPtr = (Encoding *) encoding;
|
1051 |
|
1052 |
if (src == NULL) {
|
1053 |
srcLen = 0;
|
1054 |
} else if (srcLen < 0) {
|
1055 |
srcLen = strlen(src);
|
1056 |
}
|
1057 |
if (statePtr == NULL) {
|
1058 |
flags |= TCL_ENCODING_START | TCL_ENCODING_END;
|
1059 |
statePtr = &state;
|
1060 |
}
|
1061 |
if (srcReadPtr == NULL) {
|
1062 |
srcReadPtr = &srcRead;
|
1063 |
}
|
1064 |
if (dstWrotePtr == NULL) {
|
1065 |
dstWrotePtr = &dstWrote;
|
1066 |
}
|
1067 |
if (dstCharsPtr == NULL) {
|
1068 |
dstCharsPtr = &dstChars;
|
1069 |
}
|
1070 |
|
1071 |
dstLen -= encodingPtr->nullSize;
|
1072 |
result = (*encodingPtr->fromUtfProc)(encodingPtr->clientData, src, srcLen,
|
1073 |
flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr,
|
1074 |
dstCharsPtr);
|
1075 |
if (encodingPtr->nullSize == 2) {
|
1076 |
dst[*dstWrotePtr + 1] = '\0';
|
1077 |
}
|
1078 |
dst[*dstWrotePtr] = '\0';
|
1079 |
|
1080 |
return result;
|
1081 |
}
|
1082 |
|
1083 |
/*
|
1084 |
*---------------------------------------------------------------------------
|
1085 |
*
|
1086 |
* Tcl_FindExecutable --
|
1087 |
*
|
1088 |
* This procedure computes the absolute path name of the current
|
1089 |
* application, given its argv[0] value.
|
1090 |
*
|
1091 |
* Results:
|
1092 |
* None.
|
1093 |
*
|
1094 |
* Side effects:
|
1095 |
* The variable tclExecutableName gets filled in with the file
|
1096 |
* name for the application, if we figured it out. If we couldn't
|
1097 |
* figure it out, tclExecutableName is set to NULL.
|
1098 |
*
|
1099 |
*---------------------------------------------------------------------------
|
1100 |
*/
|
1101 |
|
1102 |
void
|
1103 |
Tcl_FindExecutable(argv0)
|
1104 |
CONST char *argv0; /* The value of the application's argv[0]
|
1105 |
* (native). */
|
1106 |
{
|
1107 |
CONST char *name;
|
1108 |
Tcl_DString buffer, nameString;
|
1109 |
|
1110 |
TclInitSubsystems(argv0);
|
1111 |
|
1112 |
if (argv0 == NULL) {
|
1113 |
goto done;
|
1114 |
}
|
1115 |
if (tclExecutableName != NULL) {
|
1116 |
ckfree(tclExecutableName);
|
1117 |
tclExecutableName = NULL;
|
1118 |
}
|
1119 |
if ((name = TclpFindExecutable(argv0)) == NULL) {
|
1120 |
goto done;
|
1121 |
}
|
1122 |
|
1123 |
/*
|
1124 |
* The value returned from TclpNameOfExecutable is a UTF string that
|
1125 |
* is possibly dirty depending on when it was initialized. To assure
|
1126 |
* that the UTF string is a properly encoded native string for this
|
1127 |
* system, convert the UTF string to the default native encoding
|
1128 |
* before the default encoding is initialized. Then, convert it back
|
1129 |
* to UTF after the system encoding is loaded.
|
1130 |
*/
|
1131 |
|
1132 |
Tcl_UtfToExternalDString(NULL, name, -1, &buffer);
|
1133 |
TclFindEncodings(argv0);
|
1134 |
|
1135 |
/*
|
1136 |
* Now it is OK to convert the native string back to UTF and set
|
1137 |
* the value of the tclExecutableName.
|
1138 |
*/
|
1139 |
|
1140 |
Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&buffer), -1, &nameString);
|
1141 |
tclExecutableName = (char *)
|
1142 |
ckalloc((unsigned) (Tcl_DStringLength(&nameString) + 1));
|
1143 |
strcpy(tclExecutableName, Tcl_DStringValue(&nameString));
|
1144 |
|
1145 |
Tcl_DStringFree(&buffer);
|
1146 |
Tcl_DStringFree(&nameString);
|
1147 |
return;
|
1148 |
|
1149 |
done:
|
1150 |
TclFindEncodings(argv0);
|
1151 |
}
|
1152 |
|
1153 |
/*
|
1154 |
*---------------------------------------------------------------------------
|
1155 |
*
|
1156 |
* LoadEncodingFile --
|
1157 |
*
|
1158 |
* Read a file that describes an encoding and create a new Encoding
|
1159 |
* from the data.
|
1160 |
*
|
1161 |
* Results:
|
1162 |
* The return value is the newly loaded Encoding, or NULL if
|
1163 |
* the file didn't exist of was in the incorrect format. If NULL was
|
1164 |
* returned, an error message is left in interp's result object,
|
1165 |
* unless interp was NULL.
|
1166 |
*
|
1167 |
* Side effects:
|
1168 |
* File read from disk.
|
1169 |
*
|
1170 |
*---------------------------------------------------------------------------
|
1171 |
*/
|
1172 |
|
1173 |
static Tcl_Encoding
|
1174 |
LoadEncodingFile(interp, name)
|
1175 |
Tcl_Interp *interp; /* Interp for error reporting, if not NULL. */
|
1176 |
CONST char *name; /* The name of the encoding file on disk
|
1177 |
* and also the name for new encoding. */
|
1178 |
{
|
1179 |
int objc, i, ch;
|
1180 |
Tcl_Obj **objv;
|
1181 |
Tcl_Obj *pathPtr;
|
1182 |
Tcl_Channel chan;
|
1183 |
Tcl_Encoding encoding;
|
1184 |
|
1185 |
pathPtr = TclGetLibraryPath();
|
1186 |
if (pathPtr == NULL) {
|
1187 |
goto unknown;
|
1188 |
}
|
1189 |
objc = 0;
|
1190 |
Tcl_ListObjGetElements(NULL, pathPtr, &objc, &objv);
|
1191 |
|
1192 |
chan = NULL;
|
1193 |
for (i = 0; i < objc; i++) {
|
1194 |
chan = OpenEncodingFile(Tcl_GetString(objv[i]), name);
|
1195 |
if (chan != NULL) {
|
1196 |
break;
|
1197 |
}
|
1198 |
}
|
1199 |
|
1200 |
if (chan == NULL) {
|
1201 |
goto unknown;
|
1202 |
}
|
1203 |
|
1204 |
Tcl_SetChannelOption(NULL, chan, "-encoding", "utf-8");
|
1205 |
|
1206 |
while (1) {
|
1207 |
Tcl_DString ds;
|
1208 |
|
1209 |
Tcl_DStringInit(&ds);
|
1210 |
Tcl_Gets(chan, &ds);
|
1211 |
ch = Tcl_DStringValue(&ds)[0];
|
1212 |
Tcl_DStringFree(&ds);
|
1213 |
if (ch != '#') {
|
1214 |
break;
|
1215 |
}
|
1216 |
}
|
1217 |
|
1218 |
encoding = NULL;
|
1219 |
switch (ch) {
|
1220 |
case 'S': {
|
1221 |
encoding = LoadTableEncoding(interp, name, ENCODING_SINGLEBYTE,
|
1222 |
chan);
|
1223 |
break;
|
1224 |
}
|
1225 |
case 'D': {
|
1226 |
encoding = LoadTableEncoding(interp, name, ENCODING_DOUBLEBYTE,
|
1227 |
chan);
|
1228 |
break;
|
1229 |
}
|
1230 |
case 'M': {
|
1231 |
encoding = LoadTableEncoding(interp, name, ENCODING_MULTIBYTE,
|
1232 |
chan);
|
1233 |
break;
|
1234 |
}
|
1235 |
case 'E': {
|
1236 |
encoding = LoadEscapeEncoding(name, chan);
|
1237 |
break;
|
1238 |
}
|
1239 |
}
|
1240 |
if ((encoding == NULL) && (interp != NULL)) {
|
1241 |
Tcl_AppendResult(interp, "invalid encoding file \"", name, "\"", NULL);
|
1242 |
}
|
1243 |
Tcl_Close(NULL, chan);
|
1244 |
return encoding;
|
1245 |
|
1246 |
unknown:
|
1247 |
if (interp != NULL) {
|
1248 |
Tcl_AppendResult(interp, "unknown encoding \"", name, "\"", NULL);
|
1249 |
}
|
1250 |
return NULL;
|
1251 |
}
|
1252 |
|
1253 |
/*
|
1254 |
*----------------------------------------------------------------------
|
1255 |
*
|
1256 |
* OpenEncodingFile --
|
1257 |
*
|
1258 |
* Look for the file encoding/<name>.enc in the specified
|
1259 |
* directory.
|
1260 |
*
|
1261 |
* Results:
|
1262 |
* Returns an open file channel if the file exists.
|
1263 |
*
|
1264 |
* Side effects:
|
1265 |
* None.
|
1266 |
*
|
1267 |
*----------------------------------------------------------------------
|
1268 |
*/
|
1269 |
|
1270 |
static Tcl_Channel
|
1271 |
OpenEncodingFile(dir, name)
|
1272 |
CONST char *dir;
|
1273 |
CONST char *name;
|
1274 |
|
1275 |
{
|
1276 |
char *argv[3];
|
1277 |
Tcl_DString pathString;
|
1278 |
char *path;
|
1279 |
Tcl_Channel chan;
|
1280 |
|
1281 |
argv[0] = (char *) dir;
|
1282 |
argv[1] = "encoding";
|
1283 |
argv[2] = (char *) name;
|
1284 |
|
1285 |
Tcl_DStringInit(&pathString);
|
1286 |
Tcl_JoinPath(3, argv, &pathString);
|
1287 |
path = Tcl_DStringAppend(&pathString, ".enc", -1);
|
1288 |
chan = Tcl_OpenFileChannel(NULL, path, "r", 0);
|
1289 |
Tcl_DStringFree(&pathString);
|
1290 |
|
1291 |
return chan;
|
1292 |
}
|
1293 |
|
1294 |
/*
|
1295 |
*-------------------------------------------------------------------------
|
1296 |
*
|
1297 |
* LoadTableEncoding --
|
1298 |
*
|
1299 |
* Helper function for LoadEncodingTable(). Loads a table to that
|
1300 |
* converts between Unicode and some other encoding and creates an
|
1301 |
* encoding (using a TableEncoding structure) from that information.
|
1302 |
*
|
1303 |
* File contains binary data, but begins with a marker to indicate
|
1304 |
* byte-ordering, so that same binary file can be read on either
|
1305 |
* endian platforms.
|
1306 |
*
|
1307 |
* Results:
|
1308 |
* The return value is the new encoding, or NULL if the encoding
|
1309 |
* could not be created (because the file contained invalid data).
|
1310 |
*
|
1311 |
* Side effects:
|
1312 |
* None.
|
1313 |
*
|
1314 |
*-------------------------------------------------------------------------
|
1315 |
*/
|
1316 |
|
1317 |
static Tcl_Encoding
|
1318 |
LoadTableEncoding(interp, name, type, chan)
|
1319 |
Tcl_Interp *interp; /* Interp for temporary obj while reading. */
|
1320 |
CONST char *name; /* Name for new encoding. */
|
1321 |
int type; /* Type of encoding (ENCODING_?????). */
|
1322 |
Tcl_Channel chan; /* File containing new encoding. */
|
1323 |
{
|
1324 |
Tcl_DString lineString;
|
1325 |
Tcl_Obj *objPtr;
|
1326 |
char *line;
|
1327 |
int i, hi, lo, numPages, symbol, fallback;
|
1328 |
unsigned char used[256];
|
1329 |
unsigned int size;
|
1330 |
TableEncodingData *dataPtr;
|
1331 |
unsigned short *pageMemPtr;
|
1332 |
Tcl_EncodingType encType;
|
1333 |
char *hex;
|
1334 |
static char staticHex[] = {
|
1335 |
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, 0,
|
1336 |
10, 11, 12, 13, 14, 15
|
1337 |
};
|
1338 |
|
1339 |
hex = staticHex - '0';
|
1340 |
|
1341 |
Tcl_DStringInit(&lineString);
|
1342 |
Tcl_Gets(chan, &lineString);
|
1343 |
line = Tcl_DStringValue(&lineString);
|
1344 |
|
1345 |
fallback = (int) strtol(line, &line, 16);
|
1346 |
symbol = (int) strtol(line, &line, 10);
|
1347 |
numPages = (int) strtol(line, &line, 10);
|
1348 |
Tcl_DStringFree(&lineString);
|
1349 |
|
1350 |
if (numPages < 0) {
|
1351 |
numPages = 0;
|
1352 |
} else if (numPages > 256) {
|
1353 |
numPages = 256;
|
1354 |
}
|
1355 |
|
1356 |
memset(used, 0, sizeof(used));
|
1357 |
|
1358 |
#undef PAGESIZE
|
1359 |
#define PAGESIZE (256 * sizeof(unsigned short))
|
1360 |
|
1361 |
dataPtr = (TableEncodingData *) ckalloc(sizeof(TableEncodingData));
|
1362 |
memset(dataPtr, 0, sizeof(TableEncodingData));
|
1363 |
|
1364 |
dataPtr->fallback = fallback;
|
1365 |
|
1366 |
/*
|
1367 |
* Read the table that maps characters to Unicode. Performs a single
|
1368 |
* malloc to get the memory for the array and all the pages needed by
|
1369 |
* the array.
|
1370 |
*/
|
1371 |
|
1372 |
size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE;
|
1373 |
dataPtr->toUnicode = (unsigned short **) ckalloc(size);
|
1374 |
memset(dataPtr->toUnicode, 0, size);
|
1375 |
pageMemPtr = (unsigned short *) (dataPtr->toUnicode + 256);
|
1376 |
|
1377 |
if (interp == NULL) {
|
1378 |
objPtr = Tcl_NewObj();
|
1379 |
} else {
|
1380 |
objPtr = Tcl_GetObjResult(interp);
|
1381 |
}
|
1382 |
for (i = 0; i < numPages; i++) {
|
1383 |
int ch;
|
1384 |
char *p;
|
1385 |
|
1386 |
Tcl_ReadChars(chan, objPtr, 3 + 16 * (16 * 4 + 1), 0);
|
1387 |
p = Tcl_GetString(objPtr);
|
1388 |
hi = (hex[(int)p[0]] << 4) + hex[(int)p[1]];
|
1389 |
dataPtr->toUnicode[hi] = pageMemPtr;
|
1390 |
p += 2;
|
1391 |
for (lo = 0; lo < 256; lo++) {
|
1392 |
if ((lo & 0x0f) == 0) {
|
1393 |
p++;
|
1394 |
}
|
1395 |
ch = (hex[(int)p[0]] << 12) + (hex[(int)p[1]] << 8)
|
1396 |
+ (hex[(int)p[2]] << 4) + hex[(int)p[3]];
|
1397 |
if (ch != 0) {
|
1398 |
used[ch >> 8] = 1;
|
1399 |
}
|
1400 |
*pageMemPtr = (unsigned short) ch;
|
1401 |
pageMemPtr++;
|
1402 |
p += 4;
|
1403 |
}
|
1404 |
}
|
1405 |
if (interp == NULL) {
|
1406 |
Tcl_DecrRefCount(objPtr);
|
1407 |
} else {
|
1408 |
Tcl_ResetResult(interp);
|
1409 |
}
|
1410 |
|
1411 |
if (type == ENCODING_DOUBLEBYTE) {
|
1412 |
memset(dataPtr->prefixBytes, 1, sizeof(dataPtr->prefixBytes));
|
1413 |
} else {
|
1414 |
for (hi = 1; hi < 256; hi++) {
|
1415 |
if (dataPtr->toUnicode[hi] != NULL) {
|
1416 |
dataPtr->prefixBytes[hi] = 1;
|
1417 |
}
|
1418 |
}
|
1419 |
}
|
1420 |
|
1421 |
/*
|
1422 |
* Invert toUnicode array to produce the fromUnicode array. Performs a
|
1423 |
* single malloc to get the memory for the array and all the pages
|
1424 |
* needed by the array. While reading in the toUnicode array, we
|
1425 |
* remembered what pages that would be needed for the fromUnicode array.
|
1426 |
*/
|
1427 |
|
1428 |
if (symbol) {
|
1429 |
used[0] = 1;
|
1430 |
}
|
1431 |
numPages = 0;
|
1432 |
for (hi = 0; hi < 256; hi++) {
|
1433 |
if (used[hi]) {
|
1434 |
numPages++;
|
1435 |
}
|
1436 |
}
|
1437 |
size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE;
|
1438 |
dataPtr->fromUnicode = (unsigned short **) ckalloc(size);
|
1439 |
memset(dataPtr->fromUnicode, 0, size);
|
1440 |
pageMemPtr = (unsigned short *) (dataPtr->fromUnicode + 256);
|
1441 |
|
1442 |
for (hi = 0; hi < 256; hi++) {
|
1443 |
if (dataPtr->toUnicode[hi] == NULL) {
|
1444 |
dataPtr->toUnicode[hi] = emptyPage;
|
1445 |
} else {
|
1446 |
for (lo = 0; lo < 256; lo++) {
|
1447 |
int ch;
|
1448 |
|
1449 |
ch = dataPtr->toUnicode[hi][lo];
|
1450 |
if (ch != 0) {
|
1451 |
unsigned short *page;
|
1452 |
|
1453 |
page = dataPtr->fromUnicode[ch >> 8];
|
1454 |
if (page == NULL) {
|
1455 |
page = pageMemPtr;
|
1456 |
pageMemPtr += 256;
|
1457 |
dataPtr->fromUnicode[ch >> 8] = page;
|
1458 |
}
|
1459 |
page[ch & 0xff] = (unsigned short) ((hi << 8) + lo);
|
1460 |
}
|
1461 |
}
|
1462 |
}
|
1463 |
}
|
1464 |
if (type == ENCODING_MULTIBYTE) {
|
1465 |
/*
|
1466 |
* If multibyte encodings don't have a backslash character, define
|
1467 |
* one. Otherwise, on Windows, native file names won't work because
|
1468 |
* the backslash in the file name will map to the unknown character
|
1469 |
* (question mark) when converting from UTF-8 to external encoding.
|
1470 |
*/
|
1471 |
|
1472 |
if (dataPtr->fromUnicode[0] != NULL) {
|
1473 |
if (dataPtr->fromUnicode[0]['\\'] == '\0') {
|
1474 |
dataPtr->fromUnicode[0]['\\'] = '\\';
|
1475 |
}
|
1476 |
}
|
1477 |
}
|
1478 |
if (symbol) {
|
1479 |
unsigned short *page;
|
1480 |
|
1481 |
/*
|
1482 |
* Make a special symbol encoding that not only maps the symbol
|
1483 |
* characters from their Unicode code points down into page 0, but
|
1484 |
* also ensure that the characters on page 0 map to themselves.
|
1485 |
* This is so that a symbol font can be used to display a simple
|
1486 |
* string like "abcd" and have alpha, beta, chi, delta show up,
|
1487 |
* rather than have "unknown" chars show up because strictly
|
1488 |
* speaking the symbol font doesn't have glyphs for those low ascii
|
1489 |
* chars.
|
1490 |
*/
|
1491 |
|
1492 |
page = dataPtr->fromUnicode[0];
|
1493 |
if (page == NULL) {
|
1494 |
page = pageMemPtr;
|
1495 |
dataPtr->fromUnicode[0] = page;
|
1496 |
}
|
1497 |
for (lo = 0; lo < 256; lo++) {
|
1498 |
if (dataPtr->toUnicode[0][lo] != 0) {
|
1499 |
page[lo] = (unsigned short) lo;
|
1500 |
}
|
1501 |
}
|
1502 |
}
|
1503 |
for (hi = 0; hi < 256; hi++) {
|
1504 |
if (dataPtr->fromUnicode[hi] == NULL) {
|
1505 |
dataPtr->fromUnicode[hi] = emptyPage;
|
1506 |
}
|
1507 |
}
|
1508 |
encType.encodingName = name;
|
1509 |
encType.toUtfProc = TableToUtfProc;
|
1510 |
encType.fromUtfProc = TableFromUtfProc;
|
1511 |
encType.freeProc = TableFreeProc;
|
1512 |
encType.nullSize = (type == ENCODING_DOUBLEBYTE) ? 2 : 1;
|
1513 |
encType.clientData = (ClientData) dataPtr;
|
1514 |
return Tcl_CreateEncoding(&encType);
|
1515 |
|
1516 |
}
|
1517 |
|
1518 |
/*
|
1519 |
*-------------------------------------------------------------------------
|
1520 |
*
|
1521 |
* LoadEscapeEncoding --
|
1522 |
*
|
1523 |
* Helper function for LoadEncodingTable(). Loads a state machine
|
1524 |
* that converts between Unicode and some other encoding.
|
1525 |
*
|
1526 |
* File contains text data that describes the escape sequences that
|
1527 |
* are used to choose an encoding and the associated names for the
|
1528 |
* sub-encodings.
|
1529 |
*
|
1530 |
* Results:
|
1531 |
* The return value is the new encoding, or NULL if the encoding
|
1532 |
* could not be created (because the file contained invalid data).
|
1533 |
*
|
1534 |
* Side effects:
|
1535 |
* None.
|
1536 |
*
|
1537 |
*-------------------------------------------------------------------------
|
1538 |
*/
|
1539 |
|
1540 |
static Tcl_Encoding
|
1541 |
LoadEscapeEncoding(name, chan)
|
1542 |
CONST char *name; /* Name for new encoding. */
|
1543 |
Tcl_Channel chan; /* File containing new encoding. */
|
1544 |
{
|
1545 |
int i;
|
1546 |
unsigned int size;
|
1547 |
Tcl_DString escapeData;
|
1548 |
char init[16], final[16];
|
1549 |
EscapeEncodingData *dataPtr;
|
1550 |
Tcl_EncodingType type;
|
1551 |
|
1552 |
init[0] = '\0';
|
1553 |
final[0] = '\0';
|
1554 |
Tcl_DStringInit(&escapeData);
|
1555 |
|
1556 |
while (1) {
|
1557 |
int argc;
|
1558 |
char **argv;
|
1559 |
char *line;
|
1560 |
Tcl_DString lineString;
|
1561 |
|
1562 |
Tcl_DStringInit(&lineString);
|
1563 |
if (Tcl_Gets(chan, &lineString) < 0) {
|
1564 |
break;
|
1565 |
}
|
1566 |
line = Tcl_DStringValue(&lineString);
|
1567 |
if (Tcl_SplitList(NULL, line, &argc, &argv) != TCL_OK) {
|
1568 |
continue;
|
1569 |
}
|
1570 |
if (argc >= 2) {
|
1571 |
if (strcmp(argv[0], "name") == 0) {
|
1572 |
;
|
1573 |
} else if (strcmp(argv[0], "init") == 0) {
|
1574 |
strncpy(init, argv[1], sizeof(init));
|
1575 |
init[sizeof(init) - 1] = '\0';
|
1576 |
} else if (strcmp(argv[0], "final") == 0) {
|
1577 |
strncpy(final, argv[1], sizeof(final));
|
1578 |
final[sizeof(final) - 1] = '\0';
|
1579 |
} else {
|
1580 |
EscapeSubTable est;
|
1581 |
|
1582 |
strncpy(est.sequence, argv[1], sizeof(est.sequence));
|
1583 |
est.sequence[sizeof(est.sequence) - 1] = '\0';
|
1584 |
est.sequenceLen = strlen(est.sequence);
|
1585 |
|
1586 |
strncpy(est.name, argv[0], sizeof(est.name));
|
1587 |
est.name[sizeof(est.name) - 1] = '\0';
|
1588 |
|
1589 |
est.encodingPtr = NULL;
|
1590 |
Tcl_DStringAppend(&escapeData, (char *) &est, sizeof(est));
|
1591 |
}
|
1592 |
}
|
1593 |
ckfree((char *) argv);
|
1594 |
Tcl_DStringFree(&lineString);
|
1595 |
}
|
1596 |
|
1597 |
size = sizeof(EscapeEncodingData)
|
1598 |
- sizeof(EscapeSubTable) + Tcl_DStringLength(&escapeData);
|
1599 |
dataPtr = (EscapeEncodingData *) ckalloc(size);
|
1600 |
dataPtr->initLen = strlen(init);
|
1601 |
strcpy(dataPtr->init, init);
|
1602 |
dataPtr->finalLen = strlen(final);
|
1603 |
strcpy(dataPtr->final, final);
|
1604 |
dataPtr->numSubTables = Tcl_DStringLength(&escapeData) / sizeof(EscapeSubTable);
|
1605 |
memcpy((VOID *) dataPtr->subTables, (VOID *) Tcl_DStringValue(&escapeData),
|
1606 |
(size_t) Tcl_DStringLength(&escapeData));
|
1607 |
Tcl_DStringFree(&escapeData);
|
1608 |
|
1609 |
memset(dataPtr->prefixBytes, 0, sizeof(dataPtr->prefixBytes));
|
1610 |
for (i = 0; i < dataPtr->numSubTables; i++) {
|
1611 |
dataPtr->prefixBytes[UCHAR(dataPtr->subTables[i].sequence[0])] = 1;
|
1612 |
}
|
1613 |
if (dataPtr->init[0] != '\0') {
|
1614 |
dataPtr->prefixBytes[UCHAR(dataPtr->init[0])] = 1;
|
1615 |
}
|
1616 |
if (dataPtr->final[0] != '\0') {
|
1617 |
dataPtr->prefixBytes[UCHAR(dataPtr->final[0])] = 1;
|
1618 |
}
|
1619 |
|
1620 |
type.encodingName = name;
|
1621 |
type.toUtfProc = EscapeToUtfProc;
|
1622 |
type.fromUtfProc = EscapeFromUtfProc;
|
1623 |
type.freeProc = EscapeFreeProc;
|
1624 |
type.nullSize = 1;
|
1625 |
type.clientData = (ClientData) dataPtr;
|
1626 |
|
1627 |
return Tcl_CreateEncoding(&type);
|
1628 |
}
|
1629 |
|
1630 |
/*
|
1631 |
*-------------------------------------------------------------------------
|
1632 |
*
|
1633 |
* BinaryProc --
|
1634 |
*
|
1635 |
* The default conversion when no other conversion is specified.
|
1636 |
* No translation is done; source bytes are copied directly to
|
1637 |
* destination bytes.
|
1638 |
*
|
1639 |
* Results:
|
1640 |
* Returns TCL_OK if conversion was successful.
|
1641 |
*
|
1642 |
* Side effects:
|
1643 |
* None.
|
1644 |
*
|
1645 |
*-------------------------------------------------------------------------
|
1646 |
*/
|
1647 |
|
1648 |
static int
|
1649 |
BinaryProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
1650 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1651 |
ClientData clientData; /* Not used. */
|
1652 |
CONST char *src; /* Source string (unknown encoding). */
|
1653 |
int srcLen; /* Source string length in bytes. */
|
1654 |
int flags; /* Conversion control flags. */
|
1655 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1656 |
* state information used during a piecewise
|
1657 |
* conversion. Contents of statePtr are
|
1658 |
* initialized and/or reset by conversion
|
1659 |
* routine under control of flags argument. */
|
1660 |
char *dst; /* Output buffer in which converted string
|
1661 |
* is stored. */
|
1662 |
int dstLen; /* The maximum length of output buffer in
|
1663 |
* bytes. */
|
1664 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1665 |
* source string that were converted. */
|
1666 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1667 |
* stored in the output buffer as a result of
|
1668 |
* the conversion. */
|
1669 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1670 |
* correspond to the bytes stored in the
|
1671 |
* output buffer. */
|
1672 |
{
|
1673 |
int result;
|
1674 |
|
1675 |
result = TCL_OK;
|
1676 |
dstLen -= TCL_UTF_MAX - 1;
|
1677 |
if (dstLen < 0) {
|
1678 |
dstLen = 0;
|
1679 |
}
|
1680 |
if (srcLen > dstLen) {
|
1681 |
srcLen = dstLen;
|
1682 |
result = TCL_CONVERT_NOSPACE;
|
1683 |
}
|
1684 |
|
1685 |
*srcReadPtr = srcLen;
|
1686 |
*dstWrotePtr = srcLen;
|
1687 |
*dstCharsPtr = srcLen;
|
1688 |
for ( ; --srcLen >= 0; ) {
|
1689 |
*dst++ = *src++;
|
1690 |
}
|
1691 |
return result;
|
1692 |
}
|
1693 |
|
1694 |
/*
|
1695 |
*-------------------------------------------------------------------------
|
1696 |
*
|
1697 |
* UtfToUtfProc --
|
1698 |
*
|
1699 |
* Convert from UTF-8 to UTF-8. Note that the UTF-8 to UTF-8
|
1700 |
* translation is not a no-op, because it will turn a stream of
|
1701 |
* improperly formed UTF-8 into a properly formed stream.
|
1702 |
*
|
1703 |
* Results:
|
1704 |
* Returns TCL_OK if conversion was successful.
|
1705 |
*
|
1706 |
* Side effects:
|
1707 |
* None.
|
1708 |
*
|
1709 |
*-------------------------------------------------------------------------
|
1710 |
*/
|
1711 |
|
1712 |
static int
|
1713 |
UtfToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
1714 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1715 |
ClientData clientData; /* Not used. */
|
1716 |
CONST char *src; /* Source string in UTF-8. */
|
1717 |
int srcLen; /* Source string length in bytes. */
|
1718 |
int flags; /* Conversion control flags. */
|
1719 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1720 |
* state information used during a piecewise
|
1721 |
* conversion. Contents of statePtr are
|
1722 |
* initialized and/or reset by conversion
|
1723 |
* routine under control of flags argument. */
|
1724 |
char *dst; /* Output buffer in which converted string
|
1725 |
* is stored. */
|
1726 |
int dstLen; /* The maximum length of output buffer in
|
1727 |
* bytes. */
|
1728 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1729 |
* source string that were converted. This
|
1730 |
* may be less than the original source length
|
1731 |
* if there was a problem converting some
|
1732 |
* source characters. */
|
1733 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1734 |
* stored in the output buffer as a result of
|
1735 |
* the conversion. */
|
1736 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1737 |
* correspond to the bytes stored in the
|
1738 |
* output buffer. */
|
1739 |
{
|
1740 |
CONST char *srcStart, *srcEnd, *srcClose;
|
1741 |
char *dstStart, *dstEnd;
|
1742 |
int result, numChars;
|
1743 |
Tcl_UniChar ch;
|
1744 |
|
1745 |
result = TCL_OK;
|
1746 |
|
1747 |
srcStart = src;
|
1748 |
srcEnd = src + srcLen;
|
1749 |
srcClose = srcEnd;
|
1750 |
if ((flags & TCL_ENCODING_END) == 0) {
|
1751 |
srcClose -= TCL_UTF_MAX;
|
1752 |
}
|
1753 |
|
1754 |
dstStart = dst;
|
1755 |
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
1756 |
|
1757 |
for (numChars = 0; src < srcEnd; numChars++) {
|
1758 |
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
1759 |
/*
|
1760 |
* If there is more string to follow, this will ensure that the
|
1761 |
* last UTF-8 character in the source buffer hasn't been cut off.
|
1762 |
*/
|
1763 |
|
1764 |
result = TCL_CONVERT_MULTIBYTE;
|
1765 |
break;
|
1766 |
}
|
1767 |
if (dst > dstEnd) {
|
1768 |
result = TCL_CONVERT_NOSPACE;
|
1769 |
break;
|
1770 |
}
|
1771 |
src += Tcl_UtfToUniChar(src, &ch);
|
1772 |
dst += Tcl_UniCharToUtf(ch, dst);
|
1773 |
}
|
1774 |
|
1775 |
*srcReadPtr = src - srcStart;
|
1776 |
*dstWrotePtr = dst - dstStart;
|
1777 |
*dstCharsPtr = numChars;
|
1778 |
return result;
|
1779 |
}
|
1780 |
|
1781 |
/*
|
1782 |
*-------------------------------------------------------------------------
|
1783 |
*
|
1784 |
* UnicodeToUtfProc --
|
1785 |
*
|
1786 |
* Convert from Unicode to UTF-8.
|
1787 |
*
|
1788 |
* Results:
|
1789 |
* Returns TCL_OK if conversion was successful.
|
1790 |
*
|
1791 |
* Side effects:
|
1792 |
* None.
|
1793 |
*
|
1794 |
*-------------------------------------------------------------------------
|
1795 |
*/
|
1796 |
|
1797 |
static int
|
1798 |
UnicodeToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
1799 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1800 |
ClientData clientData; /* Not used. */
|
1801 |
CONST char *src; /* Source string in Unicode. */
|
1802 |
int srcLen; /* Source string length in bytes. */
|
1803 |
int flags; /* Conversion control flags. */
|
1804 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1805 |
* state information used during a piecewise
|
1806 |
* conversion. Contents of statePtr are
|
1807 |
* initialized and/or reset by conversion
|
1808 |
* routine under control of flags argument. */
|
1809 |
char *dst; /* Output buffer in which converted string
|
1810 |
* is stored. */
|
1811 |
int dstLen; /* The maximum length of output buffer in
|
1812 |
* bytes. */
|
1813 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1814 |
* source string that were converted. This
|
1815 |
* may be less than the original source length
|
1816 |
* if there was a problem converting some
|
1817 |
* source characters. */
|
1818 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1819 |
* stored in the output buffer as a result of
|
1820 |
* the conversion. */
|
1821 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1822 |
* correspond to the bytes stored in the
|
1823 |
* output buffer. */
|
1824 |
{
|
1825 |
CONST Tcl_UniChar *wSrc, *wSrcStart, *wSrcEnd;
|
1826 |
char *dstEnd, *dstStart;
|
1827 |
int result, numChars;
|
1828 |
|
1829 |
result = TCL_OK;
|
1830 |
if ((srcLen % sizeof(Tcl_UniChar)) != 0) {
|
1831 |
result = TCL_CONVERT_MULTIBYTE;
|
1832 |
srcLen /= sizeof(Tcl_UniChar);
|
1833 |
srcLen *= sizeof(Tcl_UniChar);
|
1834 |
}
|
1835 |
|
1836 |
wSrc = (Tcl_UniChar *) src;
|
1837 |
|
1838 |
wSrcStart = (Tcl_UniChar *) src;
|
1839 |
wSrcEnd = (Tcl_UniChar *) (src + srcLen);
|
1840 |
|
1841 |
dstStart = dst;
|
1842 |
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
1843 |
|
1844 |
for (numChars = 0; wSrc < wSrcEnd; numChars++) {
|
1845 |
if (dst > dstEnd) {
|
1846 |
result = TCL_CONVERT_NOSPACE;
|
1847 |
break;
|
1848 |
}
|
1849 |
dst += Tcl_UniCharToUtf(*wSrc, dst);
|
1850 |
wSrc++;
|
1851 |
}
|
1852 |
|
1853 |
*srcReadPtr = (char *) wSrc - (char *) wSrcStart;
|
1854 |
*dstWrotePtr = dst - dstStart;
|
1855 |
*dstCharsPtr = numChars;
|
1856 |
return result;
|
1857 |
}
|
1858 |
|
1859 |
/*
|
1860 |
*-------------------------------------------------------------------------
|
1861 |
*
|
1862 |
* UtfToUnicodeProc --
|
1863 |
*
|
1864 |
* Convert from UTF-8 to Unicode.
|
1865 |
*
|
1866 |
* Results:
|
1867 |
* Returns TCL_OK if conversion was successful.
|
1868 |
*
|
1869 |
* Side effects:
|
1870 |
* None.
|
1871 |
*
|
1872 |
*-------------------------------------------------------------------------
|
1873 |
*/
|
1874 |
|
1875 |
static int
|
1876 |
UtfToUnicodeProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
1877 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1878 |
ClientData clientData; /* TableEncodingData that specifies encoding. */
|
1879 |
CONST char *src; /* Source string in UTF-8. */
|
1880 |
int srcLen; /* Source string length in bytes. */
|
1881 |
int flags; /* Conversion control flags. */
|
1882 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1883 |
* state information used during a piecewise
|
1884 |
* conversion. Contents of statePtr are
|
1885 |
* initialized and/or reset by conversion
|
1886 |
* routine under control of flags argument. */
|
1887 |
char *dst; /* Output buffer in which converted string
|
1888 |
* is stored. */
|
1889 |
int dstLen; /* The maximum length of output buffer in
|
1890 |
* bytes. */
|
1891 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1892 |
* source string that were converted. This
|
1893 |
* may be less than the original source length
|
1894 |
* if there was a problem converting some
|
1895 |
* source characters. */
|
1896 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1897 |
* stored in the output buffer as a result of
|
1898 |
* the conversion. */
|
1899 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1900 |
* correspond to the bytes stored in the
|
1901 |
* output buffer. */
|
1902 |
{
|
1903 |
CONST char *srcStart, *srcEnd, *srcClose;
|
1904 |
Tcl_UniChar *wDst, *wDstStart, *wDstEnd;
|
1905 |
int result, numChars;
|
1906 |
|
1907 |
srcStart = src;
|
1908 |
srcEnd = src + srcLen;
|
1909 |
srcClose = srcEnd;
|
1910 |
if ((flags & TCL_ENCODING_END) == 0) {
|
1911 |
srcClose -= TCL_UTF_MAX;
|
1912 |
}
|
1913 |
|
1914 |
wDst = (Tcl_UniChar *) dst;
|
1915 |
wDstStart = (Tcl_UniChar *) dst;
|
1916 |
wDstEnd = (Tcl_UniChar *) (dst + dstLen - sizeof(Tcl_UniChar));
|
1917 |
|
1918 |
result = TCL_OK;
|
1919 |
for (numChars = 0; src < srcEnd; numChars++) {
|
1920 |
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
1921 |
/*
|
1922 |
* If there is more string to follow, this will ensure that the
|
1923 |
* last UTF-8 character in the source buffer hasn't been cut off.
|
1924 |
*/
|
1925 |
|
1926 |
result = TCL_CONVERT_MULTIBYTE;
|
1927 |
break;
|
1928 |
}
|
1929 |
if (wDst > wDstEnd) {
|
1930 |
result = TCL_CONVERT_NOSPACE;
|
1931 |
break;
|
1932 |
}
|
1933 |
src += Tcl_UtfToUniChar(src, wDst);
|
1934 |
wDst++;
|
1935 |
}
|
1936 |
*srcReadPtr = src - srcStart;
|
1937 |
*dstWrotePtr = (char *) wDst - (char *) wDstStart;
|
1938 |
*dstCharsPtr = numChars;
|
1939 |
return result;
|
1940 |
}
|
1941 |
|
1942 |
/*
|
1943 |
*-------------------------------------------------------------------------
|
1944 |
*
|
1945 |
* TableToUtfProc --
|
1946 |
*
|
1947 |
* Convert from the encoding specified by the TableEncodingData into
|
1948 |
* UTF-8.
|
1949 |
*
|
1950 |
* Results:
|
1951 |
* Returns TCL_OK if conversion was successful.
|
1952 |
*
|
1953 |
* Side effects:
|
1954 |
* None.
|
1955 |
*
|
1956 |
*-------------------------------------------------------------------------
|
1957 |
*/
|
1958 |
|
1959 |
static int
|
1960 |
TableToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
1961 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
1962 |
ClientData clientData; /* TableEncodingData that specifies
|
1963 |
* encoding. */
|
1964 |
CONST char *src; /* Source string in specified encoding. */
|
1965 |
int srcLen; /* Source string length in bytes. */
|
1966 |
int flags; /* Conversion control flags. */
|
1967 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
1968 |
* state information used during a piecewise
|
1969 |
* conversion. Contents of statePtr are
|
1970 |
* initialized and/or reset by conversion
|
1971 |
* routine under control of flags argument. */
|
1972 |
char *dst; /* Output buffer in which converted string
|
1973 |
* is stored. */
|
1974 |
int dstLen; /* The maximum length of output buffer in
|
1975 |
* bytes. */
|
1976 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
1977 |
* source string that were converted. This
|
1978 |
* may be less than the original source length
|
1979 |
* if there was a problem converting some
|
1980 |
* source characters. */
|
1981 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
1982 |
* stored in the output buffer as a result of
|
1983 |
* the conversion. */
|
1984 |
int *dstCharsPtr; /* Filled with the number of characters that
|
1985 |
* correspond to the bytes stored in the
|
1986 |
* output buffer. */
|
1987 |
{
|
1988 |
CONST char *srcStart, *srcEnd;
|
1989 |
char *dstEnd, *dstStart, *prefixBytes;
|
1990 |
int result, byte, numChars;
|
1991 |
Tcl_UniChar ch;
|
1992 |
unsigned short **toUnicode;
|
1993 |
unsigned short *pageZero;
|
1994 |
TableEncodingData *dataPtr;
|
1995 |
|
1996 |
srcStart = src;
|
1997 |
srcEnd = src + srcLen;
|
1998 |
|
1999 |
dstStart = dst;
|
2000 |
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
2001 |
|
2002 |
dataPtr = (TableEncodingData *) clientData;
|
2003 |
toUnicode = dataPtr->toUnicode;
|
2004 |
prefixBytes = dataPtr->prefixBytes;
|
2005 |
pageZero = toUnicode[0];
|
2006 |
|
2007 |
result = TCL_OK;
|
2008 |
for (numChars = 0; src < srcEnd; numChars++) {
|
2009 |
if (dst > dstEnd) {
|
2010 |
result = TCL_CONVERT_NOSPACE;
|
2011 |
break;
|
2012 |
}
|
2013 |
byte = *((unsigned char *) src);
|
2014 |
if (prefixBytes[byte]) {
|
2015 |
src++;
|
2016 |
if (src >= srcEnd) {
|
2017 |
src--;
|
2018 |
result = TCL_CONVERT_MULTIBYTE;
|
2019 |
break;
|
2020 |
}
|
2021 |
ch = toUnicode[byte][*((unsigned char *) src)];
|
2022 |
} else {
|
2023 |
ch = pageZero[byte];
|
2024 |
}
|
2025 |
if ((ch == 0) && (byte != 0)) {
|
2026 |
if (flags & TCL_ENCODING_STOPONERROR) {
|
2027 |
result = TCL_CONVERT_SYNTAX;
|
2028 |
break;
|
2029 |
}
|
2030 |
if (prefixBytes[byte]) {
|
2031 |
src--;
|
2032 |
}
|
2033 |
ch = (Tcl_UniChar) byte;
|
2034 |
}
|
2035 |
dst += Tcl_UniCharToUtf(ch, dst);
|
2036 |
src++;
|
2037 |
}
|
2038 |
*srcReadPtr = src - srcStart;
|
2039 |
*dstWrotePtr = dst - dstStart;
|
2040 |
*dstCharsPtr = numChars;
|
2041 |
return result;
|
2042 |
}
|
2043 |
|
2044 |
/*
|
2045 |
*-------------------------------------------------------------------------
|
2046 |
*
|
2047 |
* TableFromUtfProc --
|
2048 |
*
|
2049 |
* Convert from UTF-8 into the encoding specified by the
|
2050 |
* TableEncodingData.
|
2051 |
*
|
2052 |
* Results:
|
2053 |
* Returns TCL_OK if conversion was successful.
|
2054 |
*
|
2055 |
* Side effects:
|
2056 |
* None.
|
2057 |
*
|
2058 |
*-------------------------------------------------------------------------
|
2059 |
*/
|
2060 |
|
2061 |
static int
|
2062 |
TableFromUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
2063 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
2064 |
ClientData clientData; /* TableEncodingData that specifies
|
2065 |
* encoding. */
|
2066 |
CONST char *src; /* Source string in UTF-8. */
|
2067 |
int srcLen; /* Source string length in bytes. */
|
2068 |
int flags; /* Conversion control flags. */
|
2069 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
2070 |
* state information used during a piecewise
|
2071 |
* conversion. Contents of statePtr are
|
2072 |
* initialized and/or reset by conversion
|
2073 |
* routine under control of flags argument. */
|
2074 |
char *dst; /* Output buffer in which converted string
|
2075 |
* is stored. */
|
2076 |
int dstLen; /* The maximum length of output buffer in
|
2077 |
* bytes. */
|
2078 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
2079 |
* source string that were converted. This
|
2080 |
* may be less than the original source length
|
2081 |
* if there was a problem converting some
|
2082 |
* source characters. */
|
2083 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
2084 |
* stored in the output buffer as a result of
|
2085 |
* the conversion. */
|
2086 |
int *dstCharsPtr; /* Filled with the number of characters that
|
2087 |
* correspond to the bytes stored in the
|
2088 |
* output buffer. */
|
2089 |
{
|
2090 |
CONST char *srcStart, *srcEnd, *srcClose;
|
2091 |
char *dstStart, *dstEnd, *prefixBytes;
|
2092 |
Tcl_UniChar ch;
|
2093 |
int result, len, word, numChars;
|
2094 |
TableEncodingData *dataPtr;
|
2095 |
unsigned short **fromUnicode;
|
2096 |
|
2097 |
result = TCL_OK;
|
2098 |
|
2099 |
dataPtr = (TableEncodingData *) clientData;
|
2100 |
prefixBytes = dataPtr->prefixBytes;
|
2101 |
fromUnicode = dataPtr->fromUnicode;
|
2102 |
|
2103 |
srcStart = src;
|
2104 |
srcEnd = src + srcLen;
|
2105 |
srcClose = srcEnd;
|
2106 |
if ((flags & TCL_ENCODING_END) == 0) {
|
2107 |
srcClose -= TCL_UTF_MAX;
|
2108 |
}
|
2109 |
|
2110 |
dstStart = dst;
|
2111 |
dstEnd = dst + dstLen - 1;
|
2112 |
|
2113 |
for (numChars = 0; src < srcEnd; numChars++) {
|
2114 |
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
2115 |
/*
|
2116 |
* If there is more string to follow, this will ensure that the
|
2117 |
* last UTF-8 character in the source buffer hasn't been cut off.
|
2118 |
*/
|
2119 |
|
2120 |
result = TCL_CONVERT_MULTIBYTE;
|
2121 |
break;
|
2122 |
}
|
2123 |
len = Tcl_UtfToUniChar(src, &ch);
|
2124 |
word = fromUnicode[(ch >> 8)][ch & 0xff];
|
2125 |
if ((word == 0) && (ch != 0)) {
|
2126 |
if (flags & TCL_ENCODING_STOPONERROR) {
|
2127 |
result = TCL_CONVERT_UNKNOWN;
|
2128 |
break;
|
2129 |
}
|
2130 |
word = dataPtr->fallback;
|
2131 |
}
|
2132 |
if (prefixBytes[(word >> 8)] != 0) {
|
2133 |
if (dst + 1 > dstEnd) {
|
2134 |
result = TCL_CONVERT_NOSPACE;
|
2135 |
break;
|
2136 |
}
|
2137 |
dst[0] = (char) (word >> 8);
|
2138 |
dst[1] = (char) word;
|
2139 |
dst += 2;
|
2140 |
} else {
|
2141 |
if (dst > dstEnd) {
|
2142 |
result = TCL_CONVERT_NOSPACE;
|
2143 |
break;
|
2144 |
}
|
2145 |
dst[0] = (char) word;
|
2146 |
dst++;
|
2147 |
}
|
2148 |
src += len;
|
2149 |
}
|
2150 |
*srcReadPtr = src - srcStart;
|
2151 |
*dstWrotePtr = dst - dstStart;
|
2152 |
*dstCharsPtr = numChars;
|
2153 |
return result;
|
2154 |
}
|
2155 |
|
2156 |
/*
|
2157 |
*---------------------------------------------------------------------------
|
2158 |
*
|
2159 |
* TableFreeProc --
|
2160 |
*
|
2161 |
* This procedure is invoked when an encoding is deleted. It deletes
|
2162 |
* the memory used by the TableEncodingData.
|
2163 |
*
|
2164 |
* Results:
|
2165 |
* None.
|
2166 |
*
|
2167 |
* Side effects:
|
2168 |
* Memory freed.
|
2169 |
*
|
2170 |
*---------------------------------------------------------------------------
|
2171 |
*/
|
2172 |
|
2173 |
static void
|
2174 |
TableFreeProc(clientData)
|
2175 |
ClientData clientData; /* TableEncodingData that specifies
|
2176 |
* encoding. */
|
2177 |
{
|
2178 |
TableEncodingData *dataPtr;
|
2179 |
|
2180 |
dataPtr = (TableEncodingData *) clientData;
|
2181 |
ckfree((char *) dataPtr->toUnicode);
|
2182 |
ckfree((char *) dataPtr->fromUnicode);
|
2183 |
ckfree((char *) dataPtr);
|
2184 |
}
|
2185 |
|
2186 |
/*
|
2187 |
*-------------------------------------------------------------------------
|
2188 |
*
|
2189 |
* EscapeToUtfProc --
|
2190 |
*
|
2191 |
* Convert from the encoding specified by the EscapeEncodingData into
|
2192 |
* UTF-8.
|
2193 |
*
|
2194 |
* Results:
|
2195 |
* Returns TCL_OK if conversion was successful.
|
2196 |
*
|
2197 |
* Side effects:
|
2198 |
* None.
|
2199 |
*
|
2200 |
*-------------------------------------------------------------------------
|
2201 |
*/
|
2202 |
|
2203 |
static int
|
2204 |
EscapeToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
2205 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
2206 |
ClientData clientData; /* EscapeEncodingData that specifies
|
2207 |
* encoding. */
|
2208 |
CONST char *src; /* Source string in specified encoding. */
|
2209 |
int srcLen; /* Source string length in bytes. */
|
2210 |
int flags; /* Conversion control flags. */
|
2211 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
2212 |
* state information used during a piecewise
|
2213 |
* conversion. Contents of statePtr are
|
2214 |
* initialized and/or reset by conversion
|
2215 |
* routine under control of flags argument. */
|
2216 |
char *dst; /* Output buffer in which converted string
|
2217 |
* is stored. */
|
2218 |
int dstLen; /* The maximum length of output buffer in
|
2219 |
* bytes. */
|
2220 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
2221 |
* source string that were converted. This
|
2222 |
* may be less than the original source length
|
2223 |
* if there was a problem converting some
|
2224 |
* source characters. */
|
2225 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
2226 |
* stored in the output buffer as a result of
|
2227 |
* the conversion. */
|
2228 |
int *dstCharsPtr; /* Filled with the number of characters that
|
2229 |
* correspond to the bytes stored in the
|
2230 |
* output buffer. */
|
2231 |
{
|
2232 |
EscapeEncodingData *dataPtr;
|
2233 |
char *prefixBytes, *tablePrefixBytes;
|
2234 |
unsigned short **tableToUnicode;
|
2235 |
Encoding *encodingPtr;
|
2236 |
int state, result, numChars;
|
2237 |
CONST char *srcStart, *srcEnd;
|
2238 |
char *dstStart, *dstEnd;
|
2239 |
|
2240 |
result = TCL_OK;
|
2241 |
|
2242 |
tablePrefixBytes = NULL; /* lint. */
|
2243 |
tableToUnicode = NULL; /* lint. */
|
2244 |
|
2245 |
dataPtr = (EscapeEncodingData *) clientData;
|
2246 |
prefixBytes = dataPtr->prefixBytes;
|
2247 |
encodingPtr = NULL;
|
2248 |
|
2249 |
srcStart = src;
|
2250 |
srcEnd = src + srcLen;
|
2251 |
|
2252 |
dstStart = dst;
|
2253 |
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
2254 |
|
2255 |
state = (int) *statePtr;
|
2256 |
if (flags & TCL_ENCODING_START) {
|
2257 |
state = 0;
|
2258 |
}
|
2259 |
|
2260 |
for (numChars = 0; src < srcEnd; ) {
|
2261 |
int byte, hi, lo, ch;
|
2262 |
|
2263 |
if (dst > dstEnd) {
|
2264 |
result = TCL_CONVERT_NOSPACE;
|
2265 |
break;
|
2266 |
}
|
2267 |
byte = *((unsigned char *) src);
|
2268 |
if (prefixBytes[byte]) {
|
2269 |
unsigned int left, len, longest;
|
2270 |
int checked, i;
|
2271 |
EscapeSubTable *subTablePtr;
|
2272 |
|
2273 |
/*
|
2274 |
* Saw the beginning of an escape sequence.
|
2275 |
*/
|
2276 |
|
2277 |
left = srcEnd - src;
|
2278 |
len = dataPtr->initLen;
|
2279 |
longest = len;
|
2280 |
checked = 0;
|
2281 |
if (len <= left) {
|
2282 |
checked++;
|
2283 |
if ((len > 0) &&
|
2284 |
(memcmp(src, dataPtr->init, len) == 0)) {
|
2285 |
/*
|
2286 |
* If we see initialization string, skip it, even if we're
|
2287 |
* not at the beginning of the buffer.
|
2288 |
*/
|
2289 |
|
2290 |
src += len;
|
2291 |
continue;
|
2292 |
}
|
2293 |
}
|
2294 |
len = dataPtr->finalLen;
|
2295 |
if (len > longest) {
|
2296 |
longest = len;
|
2297 |
}
|
2298 |
if (len <= left) {
|
2299 |
checked++;
|
2300 |
if ((len > 0) &&
|
2301 |
(memcmp(src, dataPtr->final, len) == 0)) {
|
2302 |
/*
|
2303 |
* If we see finalization string, skip it, even if we're
|
2304 |
* not at the end of the buffer.
|
2305 |
*/
|
2306 |
|
2307 |
src += len;
|
2308 |
continue;
|
2309 |
}
|
2310 |
}
|
2311 |
subTablePtr = dataPtr->subTables;
|
2312 |
for (i = 0; i < dataPtr->numSubTables; i++) {
|
2313 |
len = subTablePtr->sequenceLen;
|
2314 |
if (len > longest) {
|
2315 |
longest = len;
|
2316 |
}
|
2317 |
if (len <= left) {
|
2318 |
checked++;
|
2319 |
if ((len > 0) &&
|
2320 |
(memcmp(src, subTablePtr->sequence, len) == 0)) {
|
2321 |
state = i;
|
2322 |
encodingPtr = NULL;
|
2323 |
subTablePtr = NULL;
|
2324 |
src += len;
|
2325 |
break;
|
2326 |
}
|
2327 |
}
|
2328 |
subTablePtr++;
|
2329 |
}
|
2330 |
if (subTablePtr == NULL) {
|
2331 |
/*
|
2332 |
* A match was found, the escape sequence was consumed, and
|
2333 |
* the state was updated.
|
2334 |
*/
|
2335 |
|
2336 |
continue;
|
2337 |
}
|
2338 |
|
2339 |
/*
|
2340 |
* We have a split-up or unrecognized escape sequence. If we
|
2341 |
* checked all the sequences, then it's a syntax error,
|
2342 |
* otherwise we need more bytes to determine a match.
|
2343 |
*/
|
2344 |
|
2345 |
if ((checked == dataPtr->numSubTables + 2)
|
2346 |
|| (flags & TCL_ENCODING_END)) {
|
2347 |
if ((flags & TCL_ENCODING_STOPONERROR) == 0) {
|
2348 |
/*
|
2349 |
* Skip the unknown escape sequence.
|
2350 |
*/
|
2351 |
|
2352 |
src += longest;
|
2353 |
continue;
|
2354 |
}
|
2355 |
result = TCL_CONVERT_SYNTAX;
|
2356 |
} else {
|
2357 |
result = TCL_CONVERT_MULTIBYTE;
|
2358 |
}
|
2359 |
break;
|
2360 |
}
|
2361 |
|
2362 |
if (encodingPtr == NULL) {
|
2363 |
TableEncodingData *tableDataPtr;
|
2364 |
|
2365 |
encodingPtr = GetTableEncoding(dataPtr, state);
|
2366 |
tableDataPtr = (TableEncodingData *) encodingPtr->clientData;
|
2367 |
tablePrefixBytes = tableDataPtr->prefixBytes;
|
2368 |
tableToUnicode = tableDataPtr->toUnicode;
|
2369 |
}
|
2370 |
if (tablePrefixBytes[byte]) {
|
2371 |
src++;
|
2372 |
if (src >= srcEnd) {
|
2373 |
src--;
|
2374 |
result = TCL_CONVERT_MULTIBYTE;
|
2375 |
break;
|
2376 |
}
|
2377 |
hi = byte;
|
2378 |
lo = *((unsigned char *) src);
|
2379 |
} else {
|
2380 |
hi = 0;
|
2381 |
lo = byte;
|
2382 |
}
|
2383 |
ch = tableToUnicode[hi][lo];
|
2384 |
dst += Tcl_UniCharToUtf(ch, dst);
|
2385 |
src++;
|
2386 |
numChars++;
|
2387 |
}
|
2388 |
|
2389 |
*statePtr = (Tcl_EncodingState) state;
|
2390 |
*srcReadPtr = src - srcStart;
|
2391 |
*dstWrotePtr = dst - dstStart;
|
2392 |
*dstCharsPtr = numChars;
|
2393 |
return result;
|
2394 |
}
|
2395 |
|
2396 |
/*
|
2397 |
*-------------------------------------------------------------------------
|
2398 |
*
|
2399 |
* EscapeFromUtfProc --
|
2400 |
*
|
2401 |
* Convert from UTF-8 into the encoding specified by the
|
2402 |
* EscapeEncodingData.
|
2403 |
*
|
2404 |
* Results:
|
2405 |
* Returns TCL_OK if conversion was successful.
|
2406 |
*
|
2407 |
* Side effects:
|
2408 |
* None.
|
2409 |
*
|
2410 |
*-------------------------------------------------------------------------
|
2411 |
*/
|
2412 |
|
2413 |
static int
|
2414 |
EscapeFromUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
2415 |
srcReadPtr, dstWrotePtr, dstCharsPtr)
|
2416 |
ClientData clientData; /* EscapeEncodingData that specifies
|
2417 |
* encoding. */
|
2418 |
CONST char *src; /* Source string in UTF-8. */
|
2419 |
int srcLen; /* Source string length in bytes. */
|
2420 |
int flags; /* Conversion control flags. */
|
2421 |
Tcl_EncodingState *statePtr;/* Place for conversion routine to store
|
2422 |
* state information used during a piecewise
|
2423 |
* conversion. Contents of statePtr are
|
2424 |
* initialized and/or reset by conversion
|
2425 |
* routine under control of flags argument. */
|
2426 |
char *dst; /* Output buffer in which converted string
|
2427 |
* is stored. */
|
2428 |
int dstLen; /* The maximum length of output buffer in
|
2429 |
* bytes. */
|
2430 |
int *srcReadPtr; /* Filled with the number of bytes from the
|
2431 |
* source string that were converted. This
|
2432 |
* may be less than the original source length
|
2433 |
* if there was a problem converting some
|
2434 |
* source characters. */
|
2435 |
int *dstWrotePtr; /* Filled with the number of bytes that were
|
2436 |
* stored in the output buffer as a result of
|
2437 |
* the conversion. */
|
2438 |
int *dstCharsPtr; /* Filled with the number of characters that
|
2439 |
* correspond to the bytes stored in the
|
2440 |
* output buffer. */
|
2441 |
{
|
2442 |
EscapeEncodingData *dataPtr;
|
2443 |
Encoding *encodingPtr;
|
2444 |
CONST char *srcStart, *srcEnd, *srcClose;
|
2445 |
char *dstStart, *dstEnd;
|
2446 |
int state, result, numChars;
|
2447 |
TableEncodingData *tableDataPtr;
|
2448 |
char *tablePrefixBytes;
|
2449 |
unsigned short **tableFromUnicode;
|
2450 |
|
2451 |
result = TCL_OK;
|
2452 |
|
2453 |
dataPtr = (EscapeEncodingData *) clientData;
|
2454 |
|
2455 |
srcStart = src;
|
2456 |
srcEnd = src + srcLen;
|
2457 |
srcClose = srcEnd;
|
2458 |
if ((flags & TCL_ENCODING_END) == 0) {
|
2459 |
srcClose -= TCL_UTF_MAX;
|
2460 |
}
|
2461 |
|
2462 |
dstStart = dst;
|
2463 |
dstEnd = dst + dstLen - 1;
|
2464 |
|
2465 |
if (flags & TCL_ENCODING_START) {
|
2466 |
unsigned int len;
|
2467 |
|
2468 |
state = 0;
|
2469 |
len = dataPtr->subTables[0].sequenceLen;
|
2470 |
if (dst + dataPtr->initLen + len > dstEnd) {
|
2471 |
*srcReadPtr = 0;
|
2472 |
*dstWrotePtr = 0;
|
2473 |
return TCL_CONVERT_NOSPACE;
|
2474 |
}
|
2475 |
memcpy((VOID *) dst, (VOID *) dataPtr->init,
|
2476 |
(size_t) dataPtr->initLen);
|
2477 |
dst += dataPtr->initLen;
|
2478 |
memcpy((VOID *) dst, (VOID *) dataPtr->subTables[0].sequence,
|
2479 |
(size_t) len);
|
2480 |
dst += len;
|
2481 |
} else {
|
2482 |
state = (int) *statePtr;
|
2483 |
}
|
2484 |
|
2485 |
encodingPtr = GetTableEncoding(dataPtr, state);
|
2486 |
tableDataPtr = (TableEncodingData *) encodingPtr->clientData;
|
2487 |
tablePrefixBytes = tableDataPtr->prefixBytes;
|
2488 |
tableFromUnicode = tableDataPtr->fromUnicode;
|
2489 |
|
2490 |
for (numChars = 0; src < srcEnd; numChars++) {
|
2491 |
unsigned int len;
|
2492 |
int word;
|
2493 |
Tcl_UniChar ch;
|
2494 |
|
2495 |
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
2496 |
/*
|
2497 |
* If there is more string to follow, this will ensure that the
|
2498 |
* last UTF-8 character in the source buffer hasn't been cut off.
|
2499 |
*/
|
2500 |
|
2501 |
result = TCL_CONVERT_MULTIBYTE;
|
2502 |
break;
|
2503 |
}
|
2504 |
len = Tcl_UtfToUniChar(src, &ch);
|
2505 |
word = tableFromUnicode[(ch >> 8)][ch & 0xff];
|
2506 |
|
2507 |
if ((word == 0) && (ch != 0)) {
|
2508 |
int oldState;
|
2509 |
EscapeSubTable *subTablePtr;
|
2510 |
|
2511 |
oldState = state;
|
2512 |
for (state = 0; state < dataPtr->numSubTables; state++) {
|
2513 |
encodingPtr = GetTableEncoding(dataPtr, state);
|
2514 |
tableDataPtr = (TableEncodingData *) encodingPtr->clientData;
|
2515 |
word = tableDataPtr->fromUnicode[(ch >> 8)][ch & 0xff];
|
2516 |
if (word != 0) {
|
2517 |
break;
|
2518 |
}
|
2519 |
}
|
2520 |
|
2521 |
if (word == 0) {
|
2522 |
state = oldState;
|
2523 |
if (flags & TCL_ENCODING_STOPONERROR) {
|
2524 |
result = TCL_CONVERT_UNKNOWN;
|
2525 |
break;
|
2526 |
}
|
2527 |
encodingPtr = GetTableEncoding(dataPtr, state);
|
2528 |
tableDataPtr = (TableEncodingData *) encodingPtr->clientData;
|
2529 |
word = tableDataPtr->fallback;
|
2530 |
}
|
2531 |
|
2532 |
tablePrefixBytes = tableDataPtr->prefixBytes;
|
2533 |
tableFromUnicode = tableDataPtr->fromUnicode;
|
2534 |
|
2535 |
subTablePtr = &dataPtr->subTables[state];
|
2536 |
if (dst + subTablePtr->sequenceLen > dstEnd) {
|
2537 |
result = TCL_CONVERT_NOSPACE;
|
2538 |
break;
|
2539 |
}
|
2540 |
memcpy((VOID *) dst, (VOID *) subTablePtr->sequence,
|
2541 |
(size_t) subTablePtr->sequenceLen);
|
2542 |
dst += subTablePtr->sequenceLen;
|
2543 |
}
|
2544 |
|
2545 |
if (tablePrefixBytes[(word >> 8)] != 0) {
|
2546 |
if (dst + 1 > dstEnd) {
|
2547 |
result = TCL_CONVERT_NOSPACE;
|
2548 |
break;
|
2549 |
}
|
2550 |
dst[0] = (char) (word >> 8);
|
2551 |
dst[1] = (char) word;
|
2552 |
dst += 2;
|
2553 |
} else {
|
2554 |
if (dst > dstEnd) {
|
2555 |
result = TCL_CONVERT_NOSPACE;
|
2556 |
break;
|
2557 |
}
|
2558 |
dst[0] = (char) word;
|
2559 |
dst++;
|
2560 |
}
|
2561 |
src += len;
|
2562 |
}
|
2563 |
|
2564 |
if ((result == TCL_OK) && (flags & TCL_ENCODING_END)) {
|
2565 |
if (dst + dataPtr->finalLen > dstEnd) {
|
2566 |
result = TCL_CONVERT_NOSPACE;
|
2567 |
} else {
|
2568 |
memcpy((VOID *) dst, (VOID *) dataPtr->final,
|
2569 |
(size_t) dataPtr->finalLen);
|
2570 |
dst += dataPtr->finalLen;
|
2571 |
}
|
2572 |
}
|
2573 |
|
2574 |
*statePtr = (Tcl_EncodingState) state;
|
2575 |
*srcReadPtr = src - srcStart;
|
2576 |
*dstWrotePtr = dst - dstStart;
|
2577 |
*dstCharsPtr = numChars;
|
2578 |
return result;
|
2579 |
}
|
2580 |
|
2581 |
/*
|
2582 |
*---------------------------------------------------------------------------
|
2583 |
*
|
2584 |
* EscapeFreeProc --
|
2585 |
*
|
2586 |
* This procedure is invoked when an EscapeEncodingData encoding is
|
2587 |
* deleted. It deletes the memory used by the encoding.
|
2588 |
*
|
2589 |
* Results:
|
2590 |
* None.
|
2591 |
*
|
2592 |
* Side effects:
|
2593 |
* Memory freed.
|
2594 |
*
|
2595 |
*---------------------------------------------------------------------------
|
2596 |
*/
|
2597 |
|
2598 |
static void
|
2599 |
EscapeFreeProc(clientData)
|
2600 |
ClientData clientData; /* EscapeEncodingData that specifies encoding. */
|
2601 |
{
|
2602 |
EscapeEncodingData *dataPtr;
|
2603 |
EscapeSubTable *subTablePtr;
|
2604 |
int i;
|
2605 |
|
2606 |
dataPtr = (EscapeEncodingData *) clientData;
|
2607 |
if (dataPtr == NULL) {
|
2608 |
return;
|
2609 |
}
|
2610 |
subTablePtr = dataPtr->subTables;
|
2611 |
for (i = 0; i < dataPtr->numSubTables; i++) {
|
2612 |
FreeEncoding((Tcl_Encoding) subTablePtr->encodingPtr);
|
2613 |
subTablePtr++;
|
2614 |
}
|
2615 |
ckfree((char *) dataPtr);
|
2616 |
}
|
2617 |
|
2618 |
/*
|
2619 |
*---------------------------------------------------------------------------
|
2620 |
*
|
2621 |
* GetTableEncoding --
|
2622 |
*
|
2623 |
* Helper function for the EscapeEncodingData conversions. Gets the
|
2624 |
* encoding (of type TextEncodingData) that represents the specified
|
2625 |
* state.
|
2626 |
*
|
2627 |
* Results:
|
2628 |
* The return value is the encoding.
|
2629 |
*
|
2630 |
* Side effects:
|
2631 |
* If the encoding that represents the specified state has not
|
2632 |
* already been used by this EscapeEncoding, it will be loaded
|
2633 |
* and cached in the dataPtr.
|
2634 |
*
|
2635 |
*---------------------------------------------------------------------------
|
2636 |
*/
|
2637 |
|
2638 |
static Encoding *
|
2639 |
GetTableEncoding(dataPtr, state)
|
2640 |
EscapeEncodingData *dataPtr;/* Contains names of encodings. */
|
2641 |
int state; /* Index in dataPtr of desired Encoding. */
|
2642 |
{
|
2643 |
EscapeSubTable *subTablePtr;
|
2644 |
Encoding *encodingPtr;
|
2645 |
|
2646 |
subTablePtr = &dataPtr->subTables[state];
|
2647 |
encodingPtr = subTablePtr->encodingPtr;
|
2648 |
if (encodingPtr == NULL) {
|
2649 |
encodingPtr = (Encoding *) Tcl_GetEncoding(NULL, subTablePtr->name);
|
2650 |
if ((encodingPtr == NULL)
|
2651 |
|| (encodingPtr->toUtfProc != TableToUtfProc)) {
|
2652 |
panic("EscapeToUtfProc: invalid sub table");
|
2653 |
}
|
2654 |
subTablePtr->encodingPtr = encodingPtr;
|
2655 |
}
|
2656 |
return encodingPtr;
|
2657 |
}
|
2658 |
|
2659 |
/*
|
2660 |
*---------------------------------------------------------------------------
|
2661 |
*
|
2662 |
* unilen --
|
2663 |
*
|
2664 |
* A helper function for the Tcl_ExternalToUtf functions. This
|
2665 |
* function is similar to strlen for double-byte characters: it
|
2666 |
* returns the number of bytes in a 0x0000 terminated string.
|
2667 |
*
|
2668 |
* Results:
|
2669 |
* As above.
|
2670 |
*
|
2671 |
* Side effects:
|
2672 |
* None.
|
2673 |
*
|
2674 |
*---------------------------------------------------------------------------
|
2675 |
*/
|
2676 |
|
2677 |
static size_t
|
2678 |
unilen(src)
|
2679 |
CONST char *src;
|
2680 |
{
|
2681 |
unsigned short *p;
|
2682 |
|
2683 |
p = (unsigned short *) src;
|
2684 |
while (*p != 0x0000) {
|
2685 |
p++;
|
2686 |
}
|
2687 |
return (char *) p - src;
|
2688 |
}
|
2689 |
|
2690 |
|
2691 |
/*
|
2692 |
*-------------------------------------------------------------------------
|
2693 |
*
|
2694 |
* TclFindEncodings --
|
2695 |
*
|
2696 |
* Find and load the encoding file for this operating system.
|
2697 |
* Before this is called, Tcl makes assumptions about the
|
2698 |
* native string representation, but the true encoding is not
|
2699 |
* assured.
|
2700 |
*
|
2701 |
* Results:
|
2702 |
* None.
|
2703 |
*
|
2704 |
* Side effects:
|
2705 |
* Varied, see the respective initialization routines.
|
2706 |
*
|
2707 |
*-------------------------------------------------------------------------
|
2708 |
*/
|
2709 |
|
2710 |
void
|
2711 |
TclFindEncodings(argv0)
|
2712 |
CONST char *argv0; /* Name of executable from argv[0] to main()
|
2713 |
* in native multi-byte encoding. */
|
2714 |
{
|
2715 |
char *native;
|
2716 |
Tcl_Obj *pathPtr;
|
2717 |
Tcl_DString libPath, buffer;
|
2718 |
|
2719 |
if (encodingsInitialized == 0) {
|
2720 |
/*
|
2721 |
* Double check inside the mutex. There may be calls
|
2722 |
* back into this routine from some of the procedures below.
|
2723 |
*/
|
2724 |
|
2725 |
TclpInitLock();
|
2726 |
if (encodingsInitialized == 0) {
|
2727 |
/*
|
2728 |
* Have to set this bit here to avoid deadlock with the
|
2729 |
* routines below us that call into TclInitSubsystems.
|
2730 |
*/
|
2731 |
|
2732 |
encodingsInitialized = 1;
|
2733 |
|
2734 |
native = TclpFindExecutable(argv0);
|
2735 |
TclpInitLibraryPath(native);
|
2736 |
|
2737 |
/*
|
2738 |
* The library path was set in the TclpInitLibraryPath routine.
|
2739 |
* The string set is a dirty UTF string. To preserve the value
|
2740 |
* convert the UTF string back to native before setting the new
|
2741 |
* default encoding.
|
2742 |
*/
|
2743 |
|
2744 |
pathPtr = TclGetLibraryPath();
|
2745 |
if (pathPtr != NULL) {
|
2746 |
Tcl_UtfToExternalDString(NULL, Tcl_GetString(pathPtr), -1,
|
2747 |
&libPath);
|
2748 |
}
|
2749 |
|
2750 |
TclpSetInitialEncodings();
|
2751 |
|
2752 |
/*
|
2753 |
* Now convert the native string back to UTF.
|
2754 |
*/
|
2755 |
|
2756 |
if (pathPtr != NULL) {
|
2757 |
Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&libPath), -1,
|
2758 |
&buffer);
|
2759 |
pathPtr = Tcl_NewStringObj(Tcl_DStringValue(&buffer), -1);
|
2760 |
TclSetLibraryPath(pathPtr);
|
2761 |
|
2762 |
Tcl_DStringFree(&libPath);
|
2763 |
Tcl_DStringFree(&buffer);
|
2764 |
}
|
2765 |
}
|
2766 |
TclpInitUnlock();
|
2767 |
}
|
2768 |
}
|
2769 |
|
2770 |
|
2771 |
/* $History: tclencoding.c $
|
2772 |
*
|
2773 |
* ***************** Version 1 *****************
|
2774 |
* User: Dtashley Date: 1/02/01 Time: 1:26a
|
2775 |
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
|
2776 |
* Initial check-in.
|
2777 |
*/
|
2778 |
|
2779 |
/* End of TCLENCODING.C */ |